journal article·2018-10-09

Surface and Near-Surface Engineering of PtCo Nanowires at Atomic Scale for Enhanced Electrochemical Sensing and Catalysis

Mingchuan Luo, Yingjun Sun, Yingnan Qin, Shulin Chen, Yingjie Li, Chunji Li, Yong Yang, Dong Wu, Nuoyan Xu, Yi Xing, Lei Wang, Peng Gao, Shaojun Guo

Chemistry of Materials· Volume 30· Issue 19
Publisher page

Abstract

Among the most efficient strategies to boost the electrochemical sensing and catalysis of Pt-based multimetallic nanomaterials is atomically manipulating the surface and near-surface nanostructures, which directly govern the adsorption behavior. Using one-dimensional PtCo urchin-like nanowires as the platform, we herein achieve the construction of high-index faceted Pt-skin configuration. Such unique structure shows excellent electrocatalytic performance toward the electrochemical detection of various molecules (H2O2, NH2NH2, dopamine, and acetaminophen), with the capability of real-time monitoring of H2O2 released from living cells and an impressive detection limit of 0.4 nM. Meanwhile, the combination of high-index facet and Pt-skin architecture also enables enhanced catalytic activity for the electro-reduction of oxygen in acid, realizing a very high mass activity of 2.2 A/mgPt. Our study demonstrates the great potential of surface and near-surface engineering at the atomic level in promoting the electrocatalysis on multimetallic nanomaterials for electrochemical sensors and renewable energy technologies.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications · Electrochemical sensors and biosensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science & Engineering, College of Engineering, Peking University, Beijing 100871, China

College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Electron Microscopy Laboratory, and International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China

Collaborative Innovation Centre of Quantum Matter, Beijing 100871, China

BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China

Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, China

Funding

Peking University · Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · Office of Naval Research · National Natural Science Foundation of China · Division of Materials Research · Central People's Government of the People's Republic of China

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