Carbon-Encapsulated WOx Hybrids as Efficient Catalysts for Hydrogen Evolution

Advanced Materials
Shengyu JingPei Kang Shen

Abstract

Developing non-noble metal catalysts as Pt substitutes, with good activity and stability, remains a great challenge for cost-effective electrochemical evolution of hydrogen. Herein, carbon-encapsulated WOx anchored on a carbon support (WOx @C/C) that has remarkable Pt-like catalytic behavior for the hydrogen evolution reaction (HER) is reported. Theoretical calculations reveal that carbon encapsulation improves the conductivity, acting as an electron acceptor/donor, and also modifies the Gibbs free energy of H* values for different adsorption sites (carbon atoms over the W atom, O atom, WO bond, and hollow sites). Experimental results confirm that WOx @C/C obtained at 900 °C with 40 wt% metal loading has excellent HER activity regarding its Tafel slope and overpotential at 10 and 60 mA cm-2 , and also has outstanding stability at -50 mV for 18 h. Overall, the results and facile synthesis method offer an exciting avenue for the design of cost-effective catalysts for scalable hydrogen generation.

References

Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Jan 1, 1993·Physical Review. B, Condensed Matter·G Kresse, J Hafner
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Sep 7, 2006·Journal of Computational Chemistry·Stefan Grimme
Jan 19, 2010·Proceedings of the National Academy of Sciences of the United States of America·Samuel J PeppernickA W Castleman
Apr 23, 2011·Journal of the American Chemical Society·Yanguang LiHongjie Dai
Nov 21, 2013·Nano Letters·Damien VoiryManish Chhowalla

❮ Previous
Next ❯

Citations

May 13, 2021·Chemical Society Reviews·Cong ChenHongwei Song
Oct 29, 2019·Chemical Reviews·Jing ZhuKwok-Yin Wong
Dec 7, 2021·Chemical Society Reviews·Qiang LiuJeroen A van Bokhoven

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.