Phase-segregated NiPx@FePyOz core@shell nanoparticles: ready-to-use nanocatalysts for electro- and photo-catalytic water oxidation through in situ activation by structural transformation and spontaneous ligand removal

被引：24

作者：

Saruyama, Masaki ^{[1
]}

Kim, Sunwon ^{[2
]}

Nishino, Toshio ^{[1
]}

Sakamoto, Masanori ^{[1
]}

Haruta, Mitsutaka ^{[1
]}

Kurata, Hiroki ^{[1
]}

Akiyama, Seiji ^{[3
,4
]}

Yamada, Taro ^{[5
]}

Domen, Kazunari ^{[5
]}

Teranishi, Toshiharu ^{[1
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[2] Kyoto Univ, Grad Sch Sci, Dept Chem, Uji, Kyoto 6110011, Japan

[3] Mitsubishi Chem Grp Sci & Technol Res Ctr Inc, Aoba Ku, 1000 Kamoshida Cho, Yokohama, Kanagawa 2278502, Japan

[4] Japan Technol Res Assoc Artificial Photosynthet C, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[5] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

来源：

CHEMICAL SCIENCE | 2018年 / 9卷 / 21期

关键词：

OXYGEN EVOLUTION CATALYSTS; BIVO4; PHOTOANODES; EFFICIENT; HYDROGEN; FILMS; ELECTROCATALYSTS; NANOCRYSTALS; PERFORMANCE; NANOSHEETS; SIZE;

D O I：

10.1039/c8sc00420j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The high overpotential of the oxygen evolution reaction is a critical issue to be overcome to realize efficient overall water splitting and enable hydrogen generation powered by sunlight. Homogeneous and stable nanoparticles (NPs) dispersed in solvents are useful as both electrocatalysts and cocatalysts of photocatalysts for the electro- and photo-catalytic oxygen evolution reaction, respectively, through their adsorption on various electrode substrates. Here, phase-segregated NiPx@FePyOz core@shell NPs are selectively synthesized by the reaction of Fe(CO)(5) with amorphous NiPx seed-NPs. The NiPx@FePyOz NPs on conductive substrates exhibit higher electrocatalytic activity in the oxygen evolution reaction than those of other metal phosphide-based catalysts. The NiPx@FePyOz NPs can also be used as a cocatalyst of an anodic BiVO4 photocatalyst to boost the photocatalytic water oxidation reaction. The excellent catalytic activity and high stability of the NiPx@FePyOz NPs without any post-treatments are derived from in situ activation through both the structural transformation of NiPx@FePyOz into mixed hydroxide species, (Ni, Fe)OxHy, and the spontaneous removal of the insulating organic ligands from NPs to form a smooth and robust (Ni, Fe)OxHy/substrate heterointerface during the oxygen evolution reaction.

引用

页码：4830 / 4836

页数：7