journal article·2018-01-12

Bimetallic Carbide as a Stable Hydrogen Evolution Catalyst in Harsh Acidic Water

Meng Yang Zu, Peng Fei Liu, Chongwu Wang, Yun Wang, Li Rong Zheng, Bo Zhang, Huijun Zhao, Hua Gui Yang

ACS Energy Letters· Volume 3· Issue 1
Publisher page

Abstract

Cheap, efficient, and stable hydrogen evolution reaction (HER) electrocatalysts have long been pursued, owing to their scientific and technological importance. Currently, platinum has been regarded as the benchmarked HER electrocatalyst. Unfortunately, the low abundance and high cost impede its industrial applications. Here, we synthesize bimetallic carbide Mo6Ni6C grown on nickel foam as a HER catalyst, delivering a low overpotential of −51 mV at −10 mA cm–2 in 0.5 M H2SO4 for more than 200 h, which is among the best reported benchmarked HER catalysts in acid to date. On the basis of experimental observations and theoretical modeling, we ascribe the good activity to the proper Gibbs free energy of adsorbed hydrogen (ΔG(H*)) for the carbon active sites and attribute the stability to the corrosion-stable Mo–Mo bonds in the crystal structure. This work demonstrates the possibility for Mo6Ni6C to be one of the best candidates for HER electrocatalysts in the large-scale electrolysis industry.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · MXene and MAX Phase Materials · Catalysis and Hydrodesulfurization Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University, Southport, Queensland 4222, Australia

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China

Funding

Natural Science Foundation of Shanghai · Ministry of Education of the People's Republic of China · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China

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