Platinum nanoclusters by atomic layer deposition on three-dimensional TiO2 nanotube array for efficient hydrogen evolution. (July 2022)

• Record Type: Journal Article
• Authors: Chen, Yanhui; Wang, Yueshuai; Zheng, Lirong; Chang, Yukun; Xu, Shiyu; Wu, Yahang; Zhou, Wenyuan; Lu, Yue; Wang, Jinshu; Li, Hongyi
• Is Part Of: Materials today energy. Volume 27(2022)
• Publication Date: 2022-07
• Subjects: Three-dimensional titanium -- Atomic layer deposition -- HER -- Charge transfer -- Self-supporting electrode; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2022.101042
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Electrode design plays an important role in improving hydrogen evolution reaction (HER), and the self-supporting electrode with three-dimensional (3D) porous structure is widely adopted in the electrocatalytic hydrogen evolution. To better the performance of Pt catalyst for hydrogen evolution, a layer of TiO2 nanotube arrays (TiO2 NTs) fabricated on titanium mesh (3D-Ti) or plate Ti (P-Ti) substrate, respectively, has been selected as support materials to load Pt nanocluster (Ptx /TiO2 NTs@3D-Ti and Ptx /TiO2 NTs@P-Ti) via an atomic layer deposition method. It has been revealed that one chemical bond of Ti-O-Pt had been formed between Pt nanocluster and TiO2 nanotube. The theoretical calculations confirm that Ti-O-Pt bond can not only improve the stability of Pt nanocluster but also improve its capability for hydrogen evolution. In addition, the 3D-Ti substrate with open structure can further better Pt nanoclusters' performance on hydrogen evolution. The obtained Ptx /TiO2 NTs@3D-Ti electrode exhibits an overpotential of 53 mV in 0.5 M H2 SO4 at −10 mA cm −2, and its mass activity has been improved by a factor of 18 compared with Ptx /TiO2 NTs@P-Ti. Graphical abstract: Image 1 Highlights: One new kind of free-binder TiO2 NTs@3D-Ti electrode has been fabricated by combining anodic oxidation and ALD on Ti mesh. The 3D porous structure of Ti mesh has ahigh surface are and open structure allowing air and soltuion good trrough . The aligned porous structure of TiO2 NTs is a benefit to disperse Pt nanocluster and provide an intuitive 1D electron channel. The chemical bond of Ti-O-Pt can not only improve the stability of Pt nanocluster but also improve its capability for HER.