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用于高效析氢的配体辅助调控AuNi双金属纳米晶体的形貌

Ligand-assisted morphology regulation of AuNi bimetallic nanocrystals for efficient hydrogen evolution.

作者信息

Zhang Chu, Xue Can

机构信息

School of Materials Science and Engineering, Nanyang Technological University 50 Nanyang Avenue 639798 Singapore

出版信息

RSC Adv. 2023 Jan 4;13(2):1229-1235. doi: 10.1039/d2ra06325e. eCollection 2023 Jan 3.

DOI:10.1039/d2ra06325e
PMID:36686932
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9812016/
Abstract

We report the controllable synthesis of AuNi core-shell (c-AuNi) and Janus (j-AuNi) nanocrystals (NCs) with uniform shape, tunable size and compositions in the presence of trioctylphosphine (TOP) or triphenylphosphine (TPP). The morphology of the AuNi bimetallic NCs could be regulated by varying the structure and concentration of phosphine ligands. The ligand-directed structural evolution mechanism of AuNi bimetallic NCs was investigated and discussed in detail. When loaded on graphitic carbon nitride (GCN) for photocatalytic hydrogen generation, the obtained j-AuNi NCs showed much higher activity for hydrogen evolution than the monometallic (Au and Ni) counterparts, owing to the synergistic effect of plasmon enhanced light absorption from the Au portion and additional electron sink effect from the Ni portion. This work provides a promising route for preparing low-cost Au-based bimetallic catalysts with controllable morphologies and high activities for hydrogen production.

摘要

我们报道了在三辛基膦（TOP）或三苯基膦（TPP）存在下，可控合成具有均匀形状、可调节尺寸和组成的金镍核壳（c-AuNi）和双面（j-AuNi）纳米晶体（NCs）。通过改变膦配体的结构和浓度，可以调节金镍双金属纳米晶体的形态。详细研究和讨论了金镍双金属纳米晶体的配体导向结构演化机制。当负载在石墨相氮化碳（GCN）上用于光催化产氢时，所制备的j-AuNi纳米晶体表现出比单金属（Au和Ni）对应物更高的析氢活性，这归因于来自Au部分的等离子体增强光吸收和来自Ni部分的额外电子阱效应的协同作用。这项工作为制备具有可控形态和高制氢活性的低成本金基金属双催化剂提供了一条有前景的途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/201b720ecb2e/d2ra06325e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/2f54592bc7f8/d2ra06325e-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/77db8ce2f83f/d2ra06325e-f7.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/201b720ecb2e/d2ra06325e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/2f54592bc7f8/d2ra06325e-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/4ee6bf62d549/d2ra06325e-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/8c63819fe881/d2ra06325e-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/5b60442a04b0/d2ra06325e-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/77db8ce2f83f/d2ra06325e-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/6bb8a25d3ef5/d2ra06325e-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8c6/9812016/201b720ecb2e/d2ra06325e-f9.jpg

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