Volume 57, Issue 39 pp. 12675-12679
Communication

Tuning Gold Nanoparticles with Chelating Ligands for Highly Efficient Electrocatalytic CO2 Reduction

Dr. Zhi Cao

Dr. Zhi Cao

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001 P.R.China

National Energy Center for Coal to Liquids, Synfuels China Technology Co., Ltd, Beijing, 101400 P.R.China

Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720 USA

These authors contributed equally to this work.

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Samson B. Zacate

Samson B. Zacate

Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056 USA

These authors contributed equally to this work.

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Xiaodong Sun

Xiaodong Sun

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001 P.R.China

National Energy Center for Coal to Liquids, Synfuels China Technology Co., Ltd, Beijing, 101400 P.R.China

These authors contributed equally to this work.

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Jinjia Liu

Jinjia Liu

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001 P.R.China

National Energy Center for Coal to Liquids, Synfuels China Technology Co., Ltd, Beijing, 101400 P.R.China

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Elizabeth M. Hale

Elizabeth M. Hale

Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056 USA

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William P. Carson

William P. Carson

Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056 USA

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Sam B. Tyndall

Sam B. Tyndall

Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056 USA

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Dr. Jun Xu

Dr. Jun Xu

Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720 USA

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Dr. Xingwu Liu

Dr. Xingwu Liu

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001 P.R.China

National Energy Center for Coal to Liquids, Synfuels China Technology Co., Ltd, Beijing, 101400 P.R.China

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Dr. Xingchen Liu

Dr. Xingchen Liu

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001 P.R.China

National Energy Center for Coal to Liquids, Synfuels China Technology Co., Ltd, Beijing, 101400 P.R.China

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Dr. Chang Song

Dr. Chang Song

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001 P.R.China

National Energy Center for Coal to Liquids, Synfuels China Technology Co., Ltd, Beijing, 101400 P.R.China

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Jheng-hua Luo

Jheng-hua Luo

Department of Chemistry, National Cheng Kung University, Tainan, 701 Taiwan

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Prof. Mu-Jeng Cheng

Prof. Mu-Jeng Cheng

Department of Chemistry, National Cheng Kung University, Tainan, 701 Taiwan

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Dr. Xiaodong Wen

Corresponding Author

Dr. Xiaodong Wen

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001 P.R.China

National Energy Center for Coal to Liquids, Synfuels China Technology Co., Ltd, Beijing, 101400 P.R.China

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Prof. Wei Liu

Corresponding Author

Prof. Wei Liu

Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056 USA

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First published: 10 August 2018
Citations: 123

Graphical Abstract

Gold nanoparticles functionalized with a chelating tetradentate porphyrin ligand exhibit significantly improved catalytic activity and stability for electrochemical CO2 reduction. The inherent structural and electronic tunability of these nanoparticles offers an unrivaled degree of control over their reactivity.

Abstract

Capped chelating organic molecules are presented as a design principle for tuning heterogeneous nanoparticles for electrochemical catalysis. Gold nanoparticles (AuNPs) functionalized with a chelating tetradentate porphyrin ligand show a 110-fold enhancement compared to the oleylamine-coated AuNP in current density for electrochemical reduction of CO2 to CO in water at an overpotential of 340 mV with Faradaic efficiencies (FEs) of 93 %. These catalysts also show excellent stability without deactivation (<5 % productivity loss) within 72 hours of electrolysis. DFT calculation results further confirm the chelation effect in stabilizing molecule/NP interface and tailoring catalytic activity. This general approach is thus anticipated to be complementary to current NP catalyst design approaches.

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