Ruthenium/Carbon Nanocomposites for Efficient Hydrogen Electrocatalysis: Impacts of Halide Residues.

IF 7.5 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ChemSusChem Pub Date : 2025-05-27 DOI:10.1002/cssc.202500802

Bingzhe Yu, Qiming Liu, Chaochao Dun, Davida Briana DuBois, Bryan Hou, Dingjie Pan, John Tressel, Kiley Mayford, Colton Jones, Xiao Wang, Qingfeng Ge, Frank Bridges, Shaowei Chen

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Abstract

Ruthenium has emerged as a promising substitute for platinum towards the hydrogen evolution/oxidation reaction (HER/HOR). Herein, ruthenium/carbon composites are prepared by magnetic induction heating (300 A, 10 s) of RuCl3, RuBr3 or RuI3 loaded on hollow porous carbon cages (HNC). The HNC-RuCl3-300A sample consists of Ru nanoparticles (dia. 1.96 nm) and abundant Cl residues, HNC-RuBr3-300A possesses a larger nanoparticle size (ca. 19.36 nm) and lower content of Br residues, whereas HNC-RuI3-300A, contains only bulk-like Ru agglomerates with a minimal amount of I residues, due to reduced Ru-halide bonding interactions. Among these, HNC-RuCl3-300A exhibits the best HER activity in alkaline media, with a low overpotential of only -26 mV to reach 10 mA cm-2, even outperforming Pt/C, and can be used as the cathode catalyst for anion exchange membrane water electrolyzer (along with commercial RuO2 as the anode catalyst), producing 0.5 A cm-2 at 1.88 V for up to 100 h, a performance markedly better than that with Pt/C. HNC-RuCl3-300A also exhibits the best HOR activity, with a half-wave potential (+18 mV) even lower than that of Pt/C (+35 mV). These activities are ascribed to the combined contributions of small Ru nanoparticles and Ru-to-halide charge transfer that weaken H adsorption.

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用于高效氢电催化的钌/碳纳米复合材料：卤化物残留物的影响。

钌已成为铂在析氢/氧化反应（HER/HOR）中的一个有前途的替代品。本文将rul3、RuBr3或ru3负载在空心多孔碳笼（HNC）上，通过磁感应加热（300 A, 10 s）制备钌/碳复合材料。HNC-RuCl3-300A样品由Ru纳米颗粒(直径为。HNC-RuBr3-300A具有较大的纳米颗粒尺寸（约19.36 nm）和较低的Br残基含量，而HNC-RuBr3-300A由于减少了Ru-卤化物键相互作用，仅含有块状Ru团聚体和少量的I残基。其中，HNC-RuCl3-300A在碱性介质中表现出最好的HER活性，过电位仅为-26 mV，达到10 mA cm-2，甚至优于Pt/C，可作为阴离子交换膜水电解槽的阴极催化剂（与商用RuO2一起作为阳极催化剂），在1.88 V下产生0.5 a cm-2，持续时间长达100 h，性能明显优于Pt/C。HNC-RuCl3-300A也表现出最好的HOR活性，其半波电位（+18 mV）甚至低于Pt/C （+35 mV）。这些活性归因于小Ru纳米颗粒和Ru-卤化物电荷转移的共同作用，从而削弱了H的吸附。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ChemSusChem 化学-化学综合

CiteScore

15.80

自引率

4.80%

发文量

555

审稿时长

1.8 months

期刊介绍： ChemSusChem Impact Factor (2016): 7.226 Scope: Interdisciplinary journal Focuses on research at the interface of chemistry and sustainability Features the best research on sustainability and energy Areas Covered: Chemistry Materials Science Chemical Engineering Biotechnology