Qianqian Liu, Kehan Liu, Xiaoyi Li, Chiyuan Hui*, Jianfeng Huang*, Zexing Deng, Dan Yang, Liyun Cao and Liangliang Feng*,
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引用次数: 0
Abstract
The construction of highly active non-precious-metal electrocatalysts is the key to achieving an efficient hydrogen evolution reaction (HER). In this paper, a N-doped carbon layer composite was successfully synthesized by a self-limiting domain carbon thermal reduction strategy, in which the carbon layer was embedded with Ni/VN heterogeneous nanoparticles and Ni metal nanoclusters as well as anchored with many highly active Ni single atoms (denoted as Ni/VN/Ni-NC). The optimized Ni/VN/Ni-NC provides an abundance of active sites and high conductivity to facilitate efficient charge and mass transfer. And the electronic structure of Ni/VN heterostructures is optimized by the complementary effects of 3d orbital electrons, which contribute to the HER kinetics. The Ni/VN/Ni-NC exhibits excellent HER performance (without iR compensation) at a current density of 10 mA cm–2 with overpotentials of 84 mV (1 M KOH solution) and 166 mV (1 M PBS solution).
构建高活性非贵金属电催化剂是实现高效氢进化反应(HER)的关键。本文采用自限域碳热还原策略成功合成了一种 N 掺杂碳层复合材料,在碳层中嵌入了 Ni/VN 异质纳米颗粒和 Ni 金属纳米团簇,并锚定了许多高活性 Ni 单原子(记为 Ni/VN/Ni-NC)。优化后的 Ni/VN/Ni-NC 具有丰富的活性位点和高导电性,可促进电荷和质量的高效转移。Ni/VN 异质结构的电子结构通过 3d 轨道电子的互补效应得到了优化,从而促进了 HER 动力学。在电流密度为 10 mA cm-2 时,Ni/VN/Ni-NC 表现出优异的 HER 性能(无 iR 补偿),过电位为 84 mV(1 M KOH 溶液)和 166 mV(1 M PBS 溶液)。
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.