Gangwei Shi

National Engineering Research Center of Electromagnetic Radiation Control Materials

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Hongchuan Jiang

National Engineering Research Center of Electromagnetic Radiation Control Materials

Xinwu Deng

National Engineering Research Center of Electromagnetic Radiation Control Materials

Wanli Zhang

National Engineering Research Center of Electromagnetic Radiation Control Materials

Jiawei Tian

University of Electronic Science and Technology of China

Xiaohui Zhao

Nankai University

Yan‐Ming Liu

Xinyang Normal University

Ke‐Jing Huang

State Ethnic Affairs Commission

Jizong Zhang

Hebei Agricultural University

Jianfeng Zhang

National University of Defense Technology

Hang Xie

Fujian Medical University

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University of Electronic Science and Technology of China

National Engineering Research Center of Electromagnetic Radiation Control Materials

Xinyang Normal University

Hebei University

Shanghai Jiao Tong University

Sichuan University

Chinese Academy of Sciences

Minzu University of China

State Ethnic Affairs Commission

Guangxi University for Nationalities

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Hydrogen Sensor with Ppb-Level Detection Limit Prepared by Pd-Modified and Bi-Doped Oxidized Ni Foam

SSRN Electronic Journal (2022)

Jiawei Tian Hongchuan Jiang Xiaohui Zhao Gangwei Shi Yunyu Dai

In this work, we propose a hydrogen sensor to realize ppb-level hydrogen detection at a lower temperature. To fabricate the sensor, foamed nickel was thermally oxidized in bismuth oxide vapor to form the Bi-doped oxidized nickel foam, and Pd nanoparticles were further deposited on its surface by magnetron sputtering. This sensor possesses a unique phenomenon, that is, the response of the sensor does not decline due to repeated hydrogen charging and discharging as same as most hydrogen sensors, but keeps increasing and reaches balance eventually. The Bi3+ doping leads to a reduction in the thickness of the NiO hole accumulation layer, which contributes to the high response. The Bi5+ self-doping occurring during the repeated cycle test further promotes oxygen adsorption, so that the sensor response is continuously improved. As a result, the response of the Pd-Bi-OFN sensor to 1% hydrogen is as high as 580% in the air, and the detection limit is as low as 20 ppb at a lower temperature of 75 ˚C. Meanwhile, the sensor possesses high selectivity, great humidity stability, and long durability. This work provides an outstanding guidance to fabricate reliable ppb-level hydrogen sensors.

10.2139/ssrn.4031295

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Hydrothermal synthesis of molybdenum disulfide nanosheets as supercapacitors electrode material

Electrochimica Acta (2014)

Ke‐Jing Huang Jizong Zhang Gangwei Shi Yanming Liu

Nanosheet

Molybdenum disulfide

Hydrothermal Synthesis

10.1016/j.electacta.2014.04.007

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Citations (271)