Gui-Chang Wang

Bio: Gui-Chang Wang is an academic researcher from Nankai University. The author has contributed to research in topics: Catalysis & Selectivity. The author has an hindex of 4, co-authored 7 publications receiving 59 citations.

Steam reforming of methane: Current states of catalyst design and process upgrading

Abstract: Methane (CH4) is the major component of currently abundant natural gas and a prominent green-house gas. Steam reforming of methane (SRM) is an important technology for the conversion of CH4 into H2 and syngas. To improve the catalytic activity and coking resistance of SRM catalysts, great efforts (including the addition of promoters, development of advanced supports, and structural modification, etc.) have been made with considerable progress in the past decade. Meanwhile, a series of novel processes have been explored for more efficient and energy-saving SRM. In this scenario, a comprehensive review on the recent advances in SRM is necessary to provide a constructive insight into the development of SRM technology, however, is still lacking. Herein, the improvements in catalyst construction for conventional SRM and the newly developed SRM processes in the past decade are presented and analyzed. First, the critical issues of SRM catalysts are briefly introduced. Then, the recent research advances of the most popular Ni based catalysts and the catalysts based on the other non-noble metals (Co, Cu, Mo etc.) and the efficient but costly noble metals (Au, Pt, Pd, Rh, Ru etc.) are discussed. Furthermore, the development of the representative modified SRM processes, including thermo-photo hybrid SRM, sorbent enhanced SRM, oxidative SRM, chemical looping SRM, plasma and electrical-field enhanced SRM, is demonstrated, and their advantages and limits are compared. Finally, a critical perspective is provided to enlighten future work on this significant area.

A Systematic Theoretical Study of Water Gas Shift Reaction on Cu(111) and Cu(110): Potassium Effect

Abstract: It is crucial to probe the effect of the alkali metal additives on the forward and reverse water–gas shift reaction (WGSR and RWGSR). Density functional theory (DFT) calculations were performed to ...

Enhancing CO2 catalytic activation and direct electroreduction on in-situ exsolved Fe/MnOx nanoparticles from (Pr,Ba)2Mn2-yFeyO5+δ layered perovskites for SOEC cathodes

Abstract: Perovskite-based oxides with exsolved nanoscale transition metal particles are promising cathode materials for direct electrocatalytic reduction of CO2 in the conversion from electrical power to chemical energy through solid oxide electrolysis cells (SOECs). In this paper, a facile method for the in-situ growth of Fe/MnOx nanoparticles from double-layered perovskite (Pr,Ba)2Mn2-yFeyO5+δ substrate was developed and the mechanism of enhanced CO2 catalytic activation was studied by combined experimental characterization and first-principle calculations. We have showed that introducing A-site deficiencies in (Pr,Ba)Mn1-xFexO3-δ can promote in-situ exsolution of Fe from a nonspontaneous process to a spontaneous one thermodynamically. The exsolved Fe particles exhibit significantly enhancement effect, contributing to a highly catalytic performance of direct CO2 electrolysis (638 mA/cm2 current density under 1.60 V). Such an enhancement is attributed to the promotion of CO2 chemical adsorption, as well as the facilitation of electron transfer from the exsolved nano-particles to CO2.

Metal-support interactions in designing noble metal-based catalysts for electrochemical CO 2 reduction: Recent advances and future perspectives

Abstract: Electrochemical CO2 reduction reaction (CO2RR) offers a practical solution to current global greenhouse effect by converting excessive CO2 into value-added chemicals or fuels. Noble metal-based nanomaterials have been considered as efficient catalysts for the CO2RR owing to their high catalytic activity, long-term stability and superior selectivity to targeted products. On the other hand, they are usually loaded on different support materials in order to minimize their usage and maximize the utilization because of high price and limited reserve. The strong metal-support interaction (MSI) between the metal and substrate plays an important role in affecting the CO2RR performance. In this review, we mainly focus on different types of support materials (e.g., oxides, carbons, ligands, alloys and metal carbides) interacting with noble metal as electrocatalysts for CO2RR. Moreover, the positive effects about MSI for boosting the CO2RR performance via regulating the adsorption strength, electronic structure, coordination environment and binding energy are presented. Lastly, emerging challenges and future opportunities on noble metal electrocatalysts with strong MSI are discussed.