Review Paper
Interim report of plasma catalysis: Footprints in the past and blueprints for the future
Hyun-Ha Kim1, *, Ayman A Abdelaziz1, 2, Yoshiyuki Teramoto1, Tomohiro Nozaki3, *, Karol Hensel4, Young-Sun Mok5, Shirjana Saud5, Duc Ba Nguyen5, 6, Dae Hoon Lee7, Woo Seok Kang7
* The author to whom correspondence should be addressed.
1 Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa Tsukuba, Ibaraki 3058569, Japan
2 Physics Department, Assiut University, Assiut 71516, Egypt
3 Department of Mechanical Engineering, Tokyo Institute of Technology, O-Okayama, Tokyo, Japan
4 Department of Environmental Physics, Comenius University, Bratislava, Slovakia
5 Department of Chemical Engineering, Jeju National University, Jeju, Korea
6 Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam
7 Department of Plasma Engineering, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Korea
Abstract
Interactions at the interface of the plasma and catalyst surface have the potential to open new chemical pathways that have never been realized with conventional plasma alone or catalyst-only processes. Plasma catalysis is now facing a rapid growth phase after a long, gradual period of growth over several decades. This interim report aims to analyze the progress of plasma catalysis over the last two decades and provide some future challenges. For readers who are laymen in this field, a brief explanation of plasma catalysis is provided in the introduction. The first part of the interim report addresses five important matching issues for plasma and one for catalyst. We also collectively present experimental evidence in the literature that underpins the interaction of plasma with a catalyst that is directly inserted into the plasma zone. We also emphasize on synergy, which is sometimes mistreated by neglecting the heating effect under a high energy input. In the second part of this report, we discuss recent achievements. A brief review of the historical development of plasma reactors from a packed-bed to a honeycomb discharge, which is suitable for large-scale applications, is provided. In the final part, some blueprints for future challenges are delineated based on the experimentally observed evidence from macro- to nano- and atomic-scale measurements. Developing effective catalysts capable of utilizing vibrationally excited hot molecules will be key for forthcoming innovations in plasma catalysis. We also underline the importance of implementing new sets of materials (both metals and supports) by introducing recent notable examples in conventional catalysis. The interlink between computational works on the macro/micro-scale and molecular/atomic-scale will be an interesting task in the future.
Keywords - Plasma catalysis, matching, synergy, operando measurement, vibrational excitation, reactor design.
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