Jitang Zhang , Shuai Guo , Beibei Xiao , Zhiping Lin , Linghui Yan , Damin Du , Shijie Shen
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引用次数: 18
Abstract
The exploration of low-cost, high-efficient and robust bifunctional electrocatalysts for water splitting is urgently desired for developing clean hydrogen energy conversion technology. In this work, we present a facile and effective one-step molten salt synthesis tactics to prepare self-supported 1D Ni-Mo based mixed-phase polyionic compounds nanorod arrays (NMNAs). Due to the exposed more active sites of this nanostructure and accelerated charge transfer derived from modulated electronic structures between Ni-Mo, the as-fabricated NMNAs electrodes deliver remarkable bifunctional electrocatalytic water splitting performance, with overpotential values of 234.2 mV at 200 mA cm−2 and 191.2 mV at 100 mA cm−2 in 1 M KOH for OER and HER, respectively. Furthermore, the alkaline electrolyzer composed of NMNAs needs a low overall-water-splitting cell voltage of 1.423 V to drive a current density of 10 mA cm−2. This work will shed light on the preparation of other related self-supporting nanostructured bifunctional electrocatalysts with excellent performance.
探索低成本、高效、稳定的水分解双功能电催化剂是发展清洁氢能转化技术的迫切需要。在这项工作中,我们提出了一种简单有效的一步熔盐合成策略来制备自支撑的一维Ni-Mo混合相多离子化合物纳米棒阵列(NMNAs)。由于这种纳米结构暴露了更多的活性位点,并且Ni-Mo之间的调制电子结构加速了电荷转移,因此制备的NMNAs电极具有显著的双功能电催化水分解性能,在200 mA cm - 2和100 mA cm - 2下,在1 M KOH下,OER和HER的过电位分别为234.2 mV和191.2 mV。此外,由NMNAs组成的碱性电解槽需要1.423 V的低总水分解电池电压来驱动10 mA cm−2的电流密度。本研究将为制备其他性能优异的自支撑型纳米结构双功能电催化剂提供参考。
期刊介绍:
The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.