Ligand removal energetics control CO2 electroreduction selectivity on atomically precise, ligated alloy nanoclusters
Journal Article
·
· Environmental Science: Nano
- Univ. of Pittsburgh, PA (United States)
Atomically precise, thiolate-protected gold nanoclusters (TPNCs) exhibit remarkable catalytic performance for the electrochemical reduction of carbon dioxide (CO2R) to CO. The origin of their high CO2R activity and selectivity has been attributed to partial ligand removal from the thiolate-covered surfaces of TPNCs to expose catalytically active sulfur atoms. Recently, heterometal doped (alloy) TPNCs have been shown to exhibit enhanced CO2R activity and selectivity compared to their monometallic counterparts. However, systematic studies on the effect of doping (metal type and location on TPNC) on active site exposure and CO2R activity are missing in literature. Herein, we apply Density Functional Theory calculations to investigate the effect of heterometal (Pt, Pd, Hg and Cd) doping of Au25(SR)18 TPNC on the active site exposure and CO2R activity and selectivity. In this study, we reveal that doping significantly modifies relevant TPNC electronic properties, such as electron affinity, while also altering partial ligand removal and carboxyl (*COOH) intermediate formation energies. Furthermore, we demonstrate that changing the dopant (e.g. Hg) position can change the selectivity of the TPNC towards CO(g) or H2(g) formation, highlighting the importance of dopant locations in TPNC-based CO2R. Most notably, we report a universal (i.e. capturing different dopant types and positions) linear trend between the ligand removal energy and i) the *COOH formation energy, as well as, ii) the hydrogen (*H) formation energy on the different alloy TPNCs. Thus, utilizing the ligand removal energy as a descriptor for CO2RR activity and selectivity, our work opens new avenues for accelerated computational screening of different alloy TPNCs for electrocatalytic CO2R applications.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- National Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1982249
- Journal Information:
- Environmental Science: Nano, Journal Name: Environmental Science: Nano Journal Issue: 6 Vol. 9; ISSN 2051-8153
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ligand removal of Au25 nanoclusters by thermal and electrochemical treatments for selective CO2 electroreduction to CO
Thiolate‐Protected Single‐Atom Alloy Nanoclusters: Correlation between Electronic Properties and Catalytic Activities
The role of ligands in atomically precise nanocluster-catalyzed CO2 electrochemical reduction
Journal Article
·
Sun Aug 01 20:00:00 EDT 2021
· Journal of Chemical Physics
·
OSTI ID:1825919
Thiolate‐Protected Single‐Atom Alloy Nanoclusters: Correlation between Electronic Properties and Catalytic Activities
Journal Article
·
Tue Nov 03 19:00:00 EST 2020
· Advanced Materials Interfaces
·
OSTI ID:1804166
The role of ligands in atomically precise nanocluster-catalyzed CO2 electrochemical reduction
Journal Article
·
Sun Dec 27 19:00:00 EST 2020
· Nanoscale
·
OSTI ID:1765359