Millisecond-timescale electrodeposition of platinum atom-doped molybdenum oxide as an efficient electrocatalyst for hydrogen evolution reaction

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Frontiers of Materials Science Pub Date : 2022-09-12 DOI:10.1007/s11706-022-0606-8

Yi Xiao, Wenxue Shang, Jiyuan Feng, Airu Yu, Lu Chen, Liqiu Zhang, Hongxia Shen, Qiong Cheng, Lichun Liu, Song Bai

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Abstract

We present a straightforward method for one-pot electrodeposition of platinum atoms-doped molybdenum oxide (Pt·MoO_3−x) films and show their superior electrocatalytic activity in the hydrogen evolution reaction (HER). A ∼15-nm-thick Pt·MoO_3−x film was prepared by one-pot electrodeposition at −0.8 V for 1 ms. Due to considerably different solute concentrations, the content of Pt atoms in the electrode-posited composite electrocatalyst is low. No Pt crystals or islands were observed on the flat Pt·MoO_3−x films, indicating that Pt atoms were homogeneously dispersed within the MoO_3−x thin film. The catalytic performance and physicochemical features of Pt·MoO_3−x as a HER electrocatalyst were characterized. The results showed that our Pt·MoO_3−x film exhibits 23- and 11-times higher current density than Pt and MoO_3−x electrodeposited individually under the same conditions, respectively. It was found that the dramatic enhancement in the HER performance was principally due to the abundant oxygen defects. The use of the developed one-pot electrodeposition and doping method can potentially be extended to various catalytically active metal oxides or hydroxides for enhanced performance in various energy storage and conversion applications.

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毫秒级电沉积铂原子掺杂氧化钼作为析氢反应的高效电催化剂

我们提出了一种简单的电沉积铂原子掺杂氧化钼(Pt·MoO3−x)薄膜的方法，并显示了其在析氢反应(HER)中的优越电催化活性。在−0.8 V下电沉积1 ms，制备了厚度为~ 15 nm的Pt·MoO3−x薄膜。由于溶质浓度差异较大，电极复合电催化剂中铂原子的含量较低。在平坦的Pt·MoO3−x薄膜上未观察到Pt晶体或孤岛，表明Pt原子均匀地分散在MoO3−x薄膜内。研究了Pt·MoO3−x作为HER电催化剂的催化性能和理化性质。结果表明，在相同条件下，Pt·MoO3−x薄膜的电流密度分别比单独电沉积的Pt和MoO3−x薄膜高23倍和11倍。结果表明，氧缺陷的大量存在是导致HER性能显著提高的主要原因。使用所开发的一锅电沉积和掺杂方法可以潜在地扩展到各种催化活性金属氧化物或氢氧化物，以提高各种能量存储和转换应用的性能。

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来源期刊

Frontiers of Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.20

自引率

3.70%

发文量

515

期刊介绍： Frontiers of Materials Science is a peer-reviewed international journal that publishes high quality reviews/mini-reviews, full-length research papers, and short Communications recording the latest pioneering studies on all aspects of materials science. It aims at providing a forum to promote communication and exchange between scientists in the worldwide materials science community. The subjects are seen from international and interdisciplinary perspectives covering areas including (but not limited to): Biomaterials including biomimetics and biomineralization; Nano materials; Polymers and composites; New metallic materials; Advanced ceramics; Materials modeling and computation; Frontier materials synthesis and characterization; Novel methods for materials manufacturing; Materials performance; Materials applications in energy, information and biotechnology.