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DOI	10.1039/d1ee00106j
	Proton selective adsorption on Pt-Ni nano-thorn array electrodes for superior hydrogen evolution activity
	Nairan A.; Liang C.; Chiang S.-W.; Wu Y.; Zou P.; Khan U.; Liu W.; Kang F.; Guo S.; Wu J.; Yang C.
发表日期	2021
ISSN	17545692
起始页码	1594
结束页码	1601
卷号	14 期号:3
英文摘要	Conventional acidic water electrolysis for large-scale hydrogen production needs to involve a noble metal catalyst for the anode to resist electrochemical oxidation, while alkaline electrolysis can provide better anode protection, but hydrogen ions become a minority species, which leads to sluggish hydrogen evolution reaction (HER) kinetics. Herein, by developing a unique nano-thorn-like Pt-Ni nanowire electrode as a superior HER catalyst, we enable a local "pseudo-acidic"environment near the cathode surface in an alkaline electrolyzer. In such a situation, we observed dramatic enhancement of selective H+ adsorption versus K+, leading to an extremely high HER performance towards real applications, with low overpotentials (ηgeo-surface area) of 23 mV and 71 mV at current densities of 10 mA cm-2 and 200 mA cm-2, respectively. This result is exceptionally better than the state-of-the-art Pt-based catalysts in an alkaline electrolyte at large current densities (≥200 mA cm-2). The simulation result suggests that a strong local electric field around a nano-thorn structure can exponentially increase the diffusion rate of H+ towards the electrode surface as compared with K+, which promotes faster mass transfer and reaction kinetics for the HER in an alkaline medium. © 2021 The Royal Society of Chemistry.
英文关键词	Anodes; Binary alloys; Catalysts; Electric fields; Electrochemical oxidation; Electrolysis; Electrolytes; Hydrogen evolution reaction; Mass transfer; Platinum alloys; Precious metals; Reaction kinetics; Alkaline electrolysis; Alkaline electrolytes; Hydrogen evolution; Large current density; Large scale hydrogen production; Local electric field; Noble metal catalysts; Selective adsorption; Hydrogen production; array; electrode; electron; hydrogen
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190758
作者单位	Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China; Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, 518055, China; College of Engineering, Peking University, No. 5 Yiheyuan Road, Haidian District, Beijing, 100871, China; Center of Hydrogen Science, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China; Materials Genome Initiative Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
推荐引用方式 GB/T 7714	Nairan A.,Liang C.,Chiang S.-W.,et al. Proton selective adsorption on Pt-Ni nano-thorn array electrodes for superior hydrogen evolution activity[J],2021,14(3).
APA	Nairan A..,Liang C..,Chiang S.-W..,Wu Y..,Zou P..,...&Yang C..(2021).Proton selective adsorption on Pt-Ni nano-thorn array electrodes for superior hydrogen evolution activity.Energy & Environmental Science,14(3).
MLA	Nairan A.,et al."Proton selective adsorption on Pt-Ni nano-thorn array electrodes for superior hydrogen evolution activity".Energy & Environmental Science 14.3(2021).