Zhen‐Bo Wang

Harbin Institute of Technology

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Lei Zhao

Fuzhou University

108

Da‐Ming Gu

Harbin Institute of Technology

Xu‐Lei Sui

Shenzhen University

Fu‐Da Yu

Huaqiao University

Geping Yin

Harbin Institute of Technology

Lan‐Fang Que

Huaqiao University

Yunshan Jiang

Harbin Institute of Technology

Liang Deng

Harbin Institute of Technology

Gang Sun

Shenzhen University

Yuan Xue

China University of Geosciences (Beijing)

Cooperative Institutions

Harbin Institute of Technology

234

Chinese Academy of Sciences

216

University of Chinese Academy of Sciences

100

Shenzhen University

Tsinghua University

Wuhan University of Technology

University of Science and Technology of China

Harbin University

Sichuan University

Huazhong University of Science and Technology

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Recent advances in high‐loading catalysts for low‐temperature fuel cells: From nanoparticle to single atom

SusMat (2021)

Lixiao Shen Miao Ma Fengdi Tu Zigang Zhao Yunfei Xia

Abstract Low‐temperature fuel cells (LTFCs) are considered to be one of the most promising power sources for widespread application in sustainable and renewable energy conversion technologies. Although remarkable advances have been made in the mass activity of catalysts, mass transport impedance needs to be urgently addressed at a well‐designed membrane electrode assembly (MEA) scale. Increasing the loading of electrocatalysts is conducive to prepare thinner and more efficient MEAs owing to the resulting enhanced reactant permeability, better proton diffusion, and lower electrical resistance. Herein, recent progress in high‐loading (≥40 wt.%) Pt nanoparticle catalysts (NPCs) and high‐loading (≥2 wt.%) single‐atom catalysts (SACs) for LTFC applications are reviewed. A summary of various synthetic approaches and support materials for high‐loading Pt NPCs and SACs is systematically presented. The influences of high surface area and appropriate surface functionalization for Pt NPCs, as well as coordination environment, spatial confinement effect, and strong metal‐support interactions (SMSI) for SACs are highlighted. Additionally, this review presents some ideas regarding challenges and future opportunities of high‐loading catalysts in the application of LTFCs.

Surface Modification

10.1002/sus2.38

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Citations (51)

Graphitic carbon nitride nanosheet coated carbon black as a high-performance PtRu catalyst support material for methanol electrooxidation

Journal of Materials Chemistry A (2014)

Cunzhi Li Zhen‐Bo Wang Xu‐Lei Sui Limei Zhang Da‐Ming Gu

PtRu/C@g-C₃N₄ NS exhibits excellent performance due to the inherently excellent mechanical resistance and stability of g-C₃N₄ NS and strong metal–support interactions.

Nanosheet

Graphitic carbon nitride

Carbon fibers

Carbon nitride

10.1039/c4ta04594g

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Citations (46)

Carbon riveted microcapsule Pt/MWCNTs-TiO2 catalyst prepared by in situ carbonized glucose with ultrahigh stability for proton exchange membrane fuel cell

Energy & Environmental Science (2011)

Zhengzhi Jiang Zhen‐Bo Wang Yuanyuan Chu Da‐Ming Gu Geping Yin

Pt/MWCNTs (Multi-walled carbon nanotubes, MWCNTs) and microcapsule Pt/MWCNTs-TiO2catalysts have been prepared by microwave-assisted polyol process (MAPP). Electrochemical results show that microcapsule Pt/MWCNTs-TiO2catalyst has higher activity and stability than Pt/MWCNTs due to more uniform dispersion and smaller size of Pt nanoparticles. Furthermore, carbon riveted microcapsule Pt/MWCNTs-TiO2catalyst has been designed and synthesized on the basis of in situ carbonization of glucose. The physical characteristics such as XRD, TEM, HRTEM, STEM, and XPS have indicated that the anatase TiO2 indeed entered the inside of the MWCNTs and formed the microcapsule support of MWCNTs with TiO2. The accelerated potential cycling tests (APCT) indicate that the carbon riveted microcapsule Pt/MWCNTs-TiO2catalyst with similar activity to microcapsule Pt/MWCNTs-TiO2 and Pt/C possesses 7.5-times as high stability as that of Pt/C and has 3-times as long life-span as that of carbon riveted Pt/TiO2-C reported in our previous work. The significantly enhanced stability for carbon riveted microcapsule Pt/MWCNTs-TiO2catalyst is assignable to: (1) the inherently excellent mechanical resistance and stability of anatase TiO2 and MWCNTs in acidic and oxidative environments; (2) strong metal-support interaction between Pt nanoparticles and the microcapsule support; (3) the anchoring effect of the carbon layers formed during the carbon riveting process.

Carbon fibers

10.1039/c1ee01091c

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Citations (116)

Non-Hermitian butterfly spectra in a family of quasiperiodic lattices

arXiv (Cornell University) (2024)

Li Wang Zhen‐Bo Wang Shu Chen

We propose a family of exactly solvable quasiperiodic lattice models with analytical complex mobility edges, which can incorporate mosaic modulations as a straightforward generalization. By sweeping a potential tuning parameter $\delta$, we demonstrate a kind of interesting butterfly-like spectra in complex energy plane, which depicts energy-dependent extended-localized transitions sharing a common exact non-Hermitian mobility edge. Applying Avila's global theory, we are able to analytically calculate the Lyapunov exponents and determine the mobility edges exactly. For the minimal model without mosaic modulation, a compactly analytic formula for the complex mobility edges is obtained, which, together with analytical estimation of the range of complex energy spectrum, gives the true mobility edge. The non-Hermitian mobility edge in complex energy plane is further verified by numerical calculations of fractal dimension and spatial distribution of wave functions. Tuning parameters of non-Hermitian potentials, we also investigate the variations of the non-Hermitian mobility edges and the corresponding butterfly spectra, which exhibit richness of spectrum structures.

10.48550/arxiv.2404.11020

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Electrocatalytic oxidation of dimethyl ether on ruthenium modified platinum single crystal electrodes

Catalysis Communications (2008)

Leilei Lü Geping Yin Zhen‐Bo Wang Kedi Cai Yunzhi Gao

Dimethyl ether

Deposition

10.1016/j.catcom.2008.12.042

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Citations (12)

Ultra‐Fast In Situ Reconstructed Nickel (Oxy)Hydroxide Nanoparticle Crosslinked Structure for Super‐Efficient Alkaline Water Electrolysis by Sacrificing Template Strategy

Small Structures (2023)

Pengxia Ji Deyong Zheng Huihui Jin Ding Chen Xu Luo

The rapid construction of water electrolysis catalysts by a sacrificing template in an electrochemical environment is rarely a concern. Herein, using a fluorine‐rich (F‐rich) nickel fluoride (NiF 2 ) grown on nickel foam (NF) as a sacrificial template, a highly effective alkaline catalyst is designed. In terms of in situ reassembling, the NiF 2 template can be transformed into nickel hydroxide (Ni(OH) 2 ) in hydrogen evolution reaction (HER) and nickel oxyhydroxide (NiOOH) in oxygen evolution reaction (OER), respectively, after only 100 CV cycles, on account of the rapid ion exchange of F − and OH − in an electrochemical environment. Due to the presence of nanocatalytic units, abundant lattice defects, and porous large specific surface structures caused by the reconstruction, it only takes low overpotentials of 57 mV for HER and 228 mV for OER (@10 mA cm −2 ), with outstanding stability up to 15 d (@100 mA cm −2 ). Consequently, only a low cell voltage of 1.53 V (@10 mA cm −2 ) is needed for overall water splitting, superior to commercial noble metal catalysts as benchmarks. Meanwhile, it can output stable current densities of 10, 100, and 500 mA cm −2 approaching 10 d under constant cell voltages of 1.55, 2.0, and 2.5 V, respectively.

Alkaline water electrolysis

Oxygen evolution

Electrolysis of water

10.1002/sstr.202300013

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Citations (21)

Study on the Influencing Factors Affecting the Performance of Passive Direct Methanol Fuel Cell

Journal of Chemical Engineering of Chinese Universities (2009)

Zhen‐Bo Wang

The influencing factors affecting the performances of the passive direct methanol fuel cell (DMFC) were studied. The discharge characteristics of the passive DMFC under different operation conditions,such as the feeding ways for the cathode and the anode,amounts of catalyst loading on the cathode and anode and the cell temperature,were investigated by measuring their polarization curves,power density curves and the long-term discharge performance. The results show that the slow oxygen transmission rate on the cathode and the difficulty of removing the water from the cathode are the main factors affecting the performance and the long-term discharge performance of the passive DMFC. The performance of the cell can be increased by 23.5% with active air feeding compared to that of with the passive air feeding,and the peak power density of the cell is 8.4 mW?cm?2. On the other hand,the performance of the passive DMFC increases with the increase of the catalyst loading on a given electrode. When the catalyst loading on both electrodes are 4.0 mg?cm?2,the peak power density of the passive DMFC is 11.4 mW?cm?2 at 30℃. However,the long-term discharge performance of the cell decreases with the increase of the catalyst loading on a given electrode. Especially,the increase of catalyst loading on cathode has an obvious influence on the performance of passive DMFC due to the increase of cell temperature.

Power density

Source

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Electrochemical studies of Pt/Ir–IrO2 electrocatalyst as a bifunctional oxygen electrode

International Journal of Hydrogen Energy (2011)

F. K. Kong Sheng Zhang Geping Yin Zhen‐Bo Wang Chunyu Du

Linear sweep voltammetry

Oxygen evolution

10.1016/j.ijhydene.2011.09.087

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Citations (102)