Grain Boundary Engineering of Cu–Ag Thin-Film Catalysts for Selective (Photo)Electrochemical CO2 Reduction to CO and CH4

2021 ◽  
Vol 13 (16) ◽  
pp. 18905-18913
Author(s):  
Wan Jae Dong ◽  
Jin Wook Lim ◽  
Dae Myung Hong ◽  
Jiwon Kim ◽  
Jae Yong Park ◽  
...  
Keyword(s):  
Thin Film ◽  
Grain Boundary ◽  
Co2 Reduction ◽  
Grain Boundary Engineering ◽  
Electrochemical Co2 Reduction ◽  
Thin Film Catalysts

Photo-Assisted Electrochemical CO2 Reduction Using a Translucent Thin Film Electrode

2022 ◽  
Author(s):  
Phil Woong Kang ◽  
Jinkyu Lim ◽  
Robert Haaring ◽  
Hyunjoo Lee
Keyword(s):  
Thin Film ◽  
Au Nanoparticles ◽  
Co2 Reduction ◽  
Film Electrode ◽  
Thin Film Electrode ◽  
Electrochemical Co2 Reduction ◽  
Ag Nanowires

Herein, we introduce a new concept of photo-assisted electrochemical CO2 reduction through a translucent thin film electrode. Light-compatible thin film electrode directly exposes Au nanoparticles loaded Ag nanowires to gaseous...

Grain-Boundary-Rich Copper for Efficient Solar-Driven Electrochemical CO2 Reduction to Ethylene and Ethanol

2020 ◽  
Vol 142 (15) ◽  
pp. 6878-6883 ◽  
Author(s):  
Zhiqiang Chen ◽  
Tuo Wang ◽  
Bin Liu ◽  
Dongfang Cheng ◽  
Congling Hu ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Co2 Reduction ◽  
Electrochemical Co2 Reduction

On the role of tin underlays for the prevention of thermal grooving in thin gold films

1986 ◽  
Vol 44 ◽  
pp. 732-733
Author(s):  
Jin Young Kim ◽  
R. E. Hummel ◽  
R. T. DeHoff
Keyword(s):  
Thin Film ◽  
Free Surface ◽  
Grain Boundary ◽  
Beneficial Effect ◽  
Failure Mechanism ◽  
Failure Mechanisms ◽  
Distinct Advantage ◽  
Gold Films ◽  
Gold Thin Film

Gold thin film metallizations in microelectronic circuits have a distinct advantage over those consisting of aluminum because they are less susceptible to electromigration. When electromigration is no longer the principal failure mechanism, other failure mechanisms caused by d.c. stressing might become important. In gold thin-film metallizations, grain boundary grooving is the principal failure mechanism.Previous studies have shown that grain boundary grooving in gold films can be prevented by an indium underlay between the substrate and gold. The beneficial effect of the In/Au composite film is mainly due to roughening of the surface of the gold films, redistribution of indium on the gold films and formation of In2O3 on the free surface and along the grain boundaries of the gold films during air annealing.

An NADH-Inspired Redox Mediator Strategy to Promote Second-Sphere Electron and Proton Transfer for Cooperative Electrochemical CO2 Reduction Catalyzed by Iron Porphyrin

2020 ◽  
Author(s):  
Peter T. Smith ◽  
Sophia Weng ◽  
Christopher Chang
Keyword(s):  
Proton Transfer ◽  
Co2 Reduction ◽  
Iron Porphyrin ◽  
Redox Mediators ◽  
Reservoir Properties ◽  
Proton Reduction ◽  
Electrochemical Co2 Reduction ◽  
Starting Point ◽  
Rate Improvement ◽  
Molecular Catalysts

We present a bioinspired strategy for enhancing electrochemical carbon dioxide reduction catalysis by cooperative use of base-metal molecular catalysts with intermolecular second-sphere redox mediators that facilitate both electron and proton transfer. Functional synthetic mimics of the biological redox cofactor NADH, which are electrochemically stable and are capable of mediating both electron and proton transfer, can enhance the activity of an iron porphyrin catalyst for electrochemical reduction of CO<sub>2</sub> to CO, achieving a 13-fold rate improvement without altering the intrinsic high selectivity of this catalyst platform for CO<sub>2</sub> versus proton reduction. Evaluation of a systematic series of NADH analogs and redox-inactive control additives with varying proton and electron reservoir properties reveals that both electron and proton transfer contribute to the observed catalytic enhancements. This work establishes that second-sphere dual control of electron and proton inventories is a viable design strategy for developing more effective electrocatalysts for CO<sub>2</sub> reduction, providing a starting point for broader applications of this approach to other multi-electron, multi-proton transformations.

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