Manipulating the Coordination Chemistry of RuN(O)C Moieties for Fast Alkaline Hydrogen Evolution Kinetics. (12th June 2021)

• Record Type: Journal Article
• Authors: Lao, Mengmeng; Zhao, Guoqiang; Li, Peng; Ma, Tianyi; Jiang, Yinzhu; Pan, Hongge; Dou, Shi Xue; Sun, Wenping
• Is Part Of: Advanced functional materials. Volume 31:Number 33(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-12
• Subjects: coordination chemistry -- electrocatalysis -- heterostructures -- hydrogen evolution reaction -- interface chemistry; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202100698
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: The coordination chemistry of the metal‐support interface largely determines the electrocatalytic performance of heterostructured electrocatalysts. However, it remains a great challenge to effectively manipulate the interface chemistry of heterostructures at the atomic level. Herein, functionalized carbon‐supported Ru heterostructured electrocatalysts are designed that contain abundant RuN(O)C moieties with a view towards fast hydrogen evolution reaction (HER). The coordination chemistry of the RuN(O)C moieties, and hence, the geometric and electronic structures of the Ru species can be precisely modulated via an appropriate annealing treatment. Specifically, the optimal heterostructured electrocatalyst delivers the highest specific activity by far among reported Ru‐based electrocatalysts, and the turnover frequency value reaches 32 s −1 at the overpotential (η) of 100 mV, which also surpasses the state‐of‐the‐art Pt/C catalyst in alkaline media. The interface engineering of the heterostructured electrocatalyst not only facilitates H2 O adsorption and dissociation with help from the RuN(O)C moieties, but also further optimizes the adsorption behavior of H on the metallic Ru species, thereby inducing accelerated hydrogen evolution kinetics in both alkaline and acidic media. The present results demonstrate the successful atomic‐level interface engineering of carbon‐supported Ru‐based heterostructures and shed new light on the development of advanced electrocatalysts for fast hydrogen evolution, and beyond. Abstract : Ru/NC heterostructures with abundant RuN(O)C moieties are designed for rapid alkaline hydrogen evolution reaction (HER). The coordination chemistry of RuN(O)C moieties, and hence, the geometric and electronic structures of Ru species are precisely modulated via an appropriate annealing treatment. The interfacial RuN(O)C moieties and the surface Ru species synergistically expedite the overall alkaline HER kinetics.