Accelerated active phase transformation of NiO powered by Pt single atoms for enhanced oxygen evolution reaction

doi:10.1039/c8sc02015a

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Accelerated active phase transformation of NiO powered by Pt single atoms for enhanced oxygen evolution reaction
	Lin, C ; Zhao, YH ; Zhang, HJ ; Xie, SH ; Li, YF ; Li, XP ; Jiang, Z ; Liu, ZP
刊名	CHEMICAL SCIENCE
	2018
卷号	9 期号:33 页码:6803-6812
关键词	SURFACE WALKING METHOD WATER OXIDATION NICKEL-OXIDE REDUCTION REACTION ALKALINE-SOLUTION THIN-FILMS CATALYSTS ELECTROCATALYSTS PERFORMANCE TRANSITION
ISSN号	2041-6520
DOI	10.1039/c8sc02015a
文献子类	期刊论文
英文摘要	Phase transformation of electrode materials widely occurs in electrocatalytic reactions. Metal oxides are promising electrocatalysts for the oxygen evolution reaction (OER); their phase transformation is a key step for the multi-electron OER, and requires extra overpotential. However, little attention has been paid to accelerating and enhancing the phase transformation. Here, we report for the first time that single-atom Pt incorporated into the bulk crystalline phase of porous NiO nanocubes (0.5wt% Pt/NiO) can greatly promote the active phase (NiOOH) evolution. The Pt doping was achieved by a scalable nanocasting approach using SiO2 as the hard template. In comparison with Pt/NiO samples with PtO2 nanoparticles segregated at the NiO surface (1 wt% Pt), as well as atomistic Pt atoms solely bound at the surface by atomic layer deposition, the bulk Pt doping shows the strongest power in facilitating active phase transformation, which leads to improved OER activity with reduced overpotential and Tafel slope. Experiential data revealed that the charge-transfer from Pt to Ni through O leads to a local weaker Ni-O bond. First principles calculations confirmed that rather than acting as an active site for the OER, monatomic Pt effectively increases the phase transformation rate by reducing the migration barrier of nearby Ni atoms. Our discoveries reveal the relationships of the heteroatom doped structure and phase transformation behavior during the electrochemical process and offer a new route for designing high-performance electrocatalysts.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/30834]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Fudan Univ, Collaborat Innovat Ctr Chem Energy Mat, Shanghai Key Lab Mol Catalysis & Innovat Mat, Key Lab Computat Phys Sci,Minist Educ,Dept Chem, Shanghai 200433, Peoples R China 2.Chinese Acad Sci, Shanghai Adv Res Inst, CAS Key Lab Low Carbon Convers Sci & Engn, Shanghai 201210, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Lin, C,Zhao, YH,Zhang, HJ,et al. Accelerated active phase transformation of NiO powered by Pt single atoms for enhanced oxygen evolution reaction[J]. CHEMICAL SCIENCE,2018,9(33):6803-6812.
APA	Lin, C.,Zhao, YH.,Zhang, HJ.,Xie, SH.,Li, YF.,...&Liu, ZP.(2018).Accelerated active phase transformation of NiO powered by Pt single atoms for enhanced oxygen evolution reaction.CHEMICAL SCIENCE,9(33),6803-6812.
MLA	Lin, C,et al."Accelerated active phase transformation of NiO powered by Pt single atoms for enhanced oxygen evolution reaction".CHEMICAL SCIENCE 9.33(2018):6803-6812.