journal article·2020-09-09

Boosted Oxygen Evolution Reactivity via Atomic Iron Doping in Cobalt Carbonate Hydroxide Hydrate

Shan Zhang, Bolong Huang, Liguang Wang, Xiaoyan Zhang, Haishuang Zhu, Xiaoqing Zhu, Jing Li, Shaojun Guo, Erkang Wang

ACS Applied Materials & Interfaces· Volume 12· Issue 36
Publisher page

Abstract

Cobalt carbonate hydroxide hydrate (CCHH) has long been functioning merely as a precursor to prepare compound catalysts; however, its intrinsic potential for the oxygen evolution reaction (OER) is quite limited due to its poor catalytic activity. Herein, a concept has been proposed to solve this issue by doping Fe into CCHH nanowires grown on nickel foam (denoted as Fe-CCHH/NF) for achieving efficient OER catalysis by electrochemical transformation. The obtained Fe-CCHH/NF-30 exhibits OER catalytic performance with an overpotential of only 200 mV versus the reversible hydrogen electrode (vs. RHE) at a current density of 10 mA cm –2 and small Tafel slope of 50 mV dec –1 in 1 M KOH. Moreover, it displays stability for over 130 h at a large current density of 55 mA cm –2, and no activity decline is observed after the 3000 cycle test. The performance of Fe-CCHH/NF-30 renders it one of the most promising OER catalysts. The density functional theory calculation reveals that the doped Fe can greatly enhance the OER activity by lowering the reactive energy barrier.
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Research context

OpenAlex topics: Career Development and Diversity · Educational and Psychological Assessments · Technology Assessment and Management

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Affiliations

State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China

University of Science and Technology of China, Hefei, Anhui 230029, China

Department of Materials Science & Engineering, College of Engineering, Peking University, Beijing 100871, China

Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR 999077, China

Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China

Funding

Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Beijing Municipality · Youth Innovation Promotion Association of the Chinese Academy of Sciences · National Natural Science Foundation of China · Chinese Academy of Sciences · Jilin Province Science Technology Development Plan Project

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