气候变化领域集成服务门户(CCPortal): Seamlessly conductive Co(OH)2tailored atomically dispersed Pt electrocatalyst with a hierarchical nanostructure for an efficient hydrogen evolution reaction

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DOI	10.1039/d0ee01347a
	Seamlessly conductive Co(OH)2tailored atomically dispersed Pt electrocatalyst with a hierarchical nanostructure for an efficient hydrogen evolution reaction
	Zhou K.L.; Wang C.; Wang Z.; Han C.B.; Zhang Q.; Ke X.; Liu J.; Wang H.
发表日期	2020
ISSN	17545692
起始页码	3082
结束页码	3092
卷号	13 期号:9
英文摘要	Single-atom catalysts (SACs) have exhibited extraordinary catalytic performance due to the utmost atom utilization efficiency and unique electronic states via metal-support interactions. Rationally designing SACs at the atomic level by structural engineering is desirable for an efficient hydrogen evolution reaction (HER). Herein, single-atom Pt was anchored on two-dimensional (2D) Co(OH)2 nanosheets growing on Ag nanowires (PtSA-Co(OH)2@Ag NW) to construct a seamlessly conductive network hybrid catalyst via electrochemical phase transformation from metallic Co@Ag NW. The Ag NW network provides a continuous electron transport pathway through metal active sites, contributing to an extremely low charge transfer resistance (Rct, 0.7 Ω), and the hierarchical nanostructure has a large electrochemical surface area for high atom utilization efficiency and rich mass transport pathways for hydrogen generation and release. Moreover, Co(OH)2 tailored Pt sites induce a local tip-enhancement electric field region around the Pt site and more d contribution for boosting H adsorption and H2O adsorption. Thus, the synthesized PtSA-Co(OH)2@Ag NW catalyst shows outstanding HER activity with only 29 mV overpotential in 1.0 M KOH at 10 mA cm-2 and 22.5-fold higher mass activity than the commercial Pt/C catalyst. This journal is © The Royal Society of Chemistry.
英文关键词	Atoms; Catalyst activity; Charge transfer; Efficiency; Electric fields; Electrocatalysts; Electron transport properties; Hydrogen evolution reaction; Hydrogen production; Nanostructures; Potassium hydroxide; Silver; Catalytic performance; Charge transfer resistance; Conductive networks; Electrochemical surface area; Hierarchical Nanostructures; Hydrogen generations; Metal-support interactions; Two Dimensional (2 D); Platinum; catalysis; catalyst; electrochemistry; energy efficiency; hydrogen; hydroxyl radical; platinum
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/189566
作者单位	College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China; Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing, 100124, China
推荐引用方式 GB/T 7714	Zhou K.L.,Wang C.,Wang Z.,et al. Seamlessly conductive Co(OH)2tailored atomically dispersed Pt electrocatalyst with a hierarchical nanostructure for an efficient hydrogen evolution reaction[J],2020,13(9).
APA	Zhou K.L..,Wang C..,Wang Z..,Han C.B..,Zhang Q..,...&Wang H..(2020).Seamlessly conductive Co(OH)2tailored atomically dispersed Pt electrocatalyst with a hierarchical nanostructure for an efficient hydrogen evolution reaction.Energy & Environmental Science,13(9).
MLA	Zhou K.L.,et al."Seamlessly conductive Co(OH)2tailored atomically dispersed Pt electrocatalyst with a hierarchical nanostructure for an efficient hydrogen evolution reaction".Energy & Environmental Science 13.9(2020).