Hollow Heterostructured Nanocatalysts for Boosting Electrocatalytic Water Splitting

Abstract

The implementation of electrochemical water splitting demands the development and application of electrocatalysts to overcome sluggish reaction kinetics of hydrogen/oxygen evolution reaction (HER/OER). Hollow nanostructures, particularly for hollow heterostructured nanomaterials can provide multiple solutions to accelerate the HER/OER kinetics owing to their advantageous merit. Herein, the recent advances of hollow heterostructured nanocatalysts and their excellent performance for water splitting are systematically summarized. Starting by illustrating the intrinsically advantageous features of hollow heterostructures, achievements in engineering hollow heterostructured electrocatalysts are also highlighted with the focus on structural design, interfacial engineering, composition regulation, and catalytic evaluation. Finally, some perspective insights and future challenges of hollow heterostructured nanocatalysts for electrocatalytic water splitting are also discussed.

Plasmon-Mediated Oxidase-like Activity on Ag@ZnS Heterostructured Hollow Nanowires for Rapid Visual Detection of Nitrite

“…Because of the strong self-assembly ability of 2-MIM and Zn­(NO 3 ) 2 ·6H 2 O, the resultant Ag@ZIF-8 HNWs were completely covered by the ZIF-8 polyhedron (Figure d,e). The XRD pattern of Ag@ZIF-8 HNWs also showed the corresponding characteristic peaks of ZIF-8, which were located at 7.2, 10.3, and 12.6° − (Figure S1a). With the subsequent anion-exchange reaction with S 2– , the collected Ag@ZnS retains the HNW-like structure with a rough surface (Figure f) and distinctive crystal phases of Ag and ZnS (Figure S1b).…”

Mo doping and Se vacancy engineering for boosting electrocatalytic water oxidation by regulating the electronic structure of self-supported Co9Se8@NiSe

“…These results indicated that Mo doping and Se vacancies can regulate the electronic structure of Co 9 Se 8 @NiSe/NF step by step, which optimized the adsorption energy for oxygenated intermediates and thus promoted the catalytic activity. [48][49][50][51][52] Considering the promising OER performance of Mo-Co 9 Se 8 @NiSe/NF-60, its overall water splitting (OWS) perform-ance was further explored. The equipment was assembled by coupling Mo-Co 9 Se 8 @NiSe/NF-60 with Pt/C to achieve overall water splitting (Fig.…”

Introducing Te for boosting electrocatalytic reactions

“…[1][2][3][4][5] Exploiting advanced materials and green technologies, such as water electrolysis to convert sustainable energy into clean and high-density hydrogen, electrocatalytic CO 2 , and N 2 into valueadded products, is currently promising for addressing the above-mentioned issues. [6][7][8][9][10] The key for these crucial energy conversion technologies is electrocatalysts, which can reduce the activation energy of electrochemical reactions to accelerate the reaction process. 11,12 However, most electrocatalysts cannot meet the high requirement for practical applications due to their limited catalytic activity and poor long-term stability under harsh conditions.…”