Planar-Coordination PdSe2 Nanosheets as Highly Active Electrocatalyst for Hydrogen Evolution Reaction,Advanced Functional Materials

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Planar-Coordination PdSe2 Nanosheets as Highly Active Electrocatalyst for Hydrogen Evolution Reaction
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-06-04 , DOI: 10.1002/adfm.202102321
Zhiping Lin ₁ , BeiBei Xiao ₂ , Zongpeng Wang ₁ , Weiying Tao ₁ , Shijie Shen ₁ , Liangai Huang ₁ , Jitang Zhang ₁ , Fanqi Meng ₃ , Qinghua Zhang ₃ , Lin Gu ₃ , Wenwu Zhong _{1,

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Affiliation

The coordination environment is crucial for the activity of an electrocatalyst, which defines the interaction between the central and adjacent atoms. In traditional 2D MX₂ (M = Mo, W, etc., X = S, Se), M is usually coordinated with 6 X atoms in either trigonal prismatic (2H) or octahedral (1T) polyhedrons. With such a coordination configuration, only the edge X sites exhibit activity for hydrogen evolution reaction (HER). Here, a planar-coordination transition metal chalcogenide, PdSe₂ is reported, as an efficient electrocatalyst for the HER in an alkaline electrolyte. By reducing the spatial polyhedron coordination to planar polygon coordination, the M sites in PdSe₂ can be efficiently activated to interact with the adsorptive intermediates. As a result, both Pd and Se atoms act as active sites for hydrogen evolution with neutral adsorption ability. With an overpotential of 138 mV at 10 mA cm⁻², this work advances the exploration of planar-coordination HER electrocatalysts.

中文翻译：

平面配位 PdSe2 纳米片作为析氢反应的高活性电催化剂

配位环境对电催化剂的活性至关重要，它定义了中心原子和相邻原子之间的相互作用。在传统的 2D MX ₂（M = Mo、W 等，X = S、Se）中，M 通常与 6 个 X 原子配位在三棱柱 (2H) 或八面体 (1T) 多面体中。有了这样的配位构型，只有边缘 X 位点表现出析氢反应 (HER) 的活性。在这里，报道了一种平面配位过渡金属硫族化物 PdSe ₂作为碱性电解质中 HER 的有效电催化剂。通过将空间多面体坐标减少到平面多边形坐标，PdSe _{2 中}的 M 位点可以被有效地激活以与吸附中间体相互作用。因此，Pd 和 Se 原子均作为具有中性吸附能力的析氢活性位点。在 10 mA cm ^{-2 下}具有 138 mV 的过电位，这项工作推进了对平面配位 HER 电催化剂的探索。

更新日期：2021-08-11

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