Impact of controlling the crystallinity on bifunctional electrocatalytic performances toward methanol oxidation and oxygen reduction in binary Pd–Cr solid solution

Abstract

Understanding the relationship between crystallographic structure and electrocatalytic performance is important to successfully design an efficient electrocatalyst. With finely controlled thermal H2-reduction condition, herein, binary Pd-Cr nanofiber was fabricated as...

Research progress of amorphous catalysts in the field of electrocatalysis

“…Amorphous ORR electrocatalysts come into being on this basis and attract marvelous concern. We summarized the recent amorphous electrocatalysts in ORR, as shown in Figure 20A [172][173][174][175][176][177][178][179][180][181] . Oxygen vacancies in amorphous catalysts play an important role in the ORR: they can provide reactive sites and act as electron transport media, participating in the electron transfer and energy level regulation on the catalyst surface, which affects the reaction rate and selectivity; at the same time, the active oxygen vacancies can react with oxygen or oxides to form intermediates of redox reactions and promote the reaction.…”

Electronic state regulation induced by the strong metal–support interactions boosts the performance of alcohol oxidation reactions

“…[16][17][18] Moreover, incomplete oxidation products such as CO and methyl can readily occupy the Pd active site due to the uncontrollable electronic environment, which can potentially cause catalyst poisoning. [19][20][21] To ameliorate the above situations, one promising approach is to anchor metal activity centers onto suitable supports with controllable morphology. 22 The presence of a support can assists in uniformly anchoring the Pd NPs, thereby limiting its agglomeration density.…”

Synergistic effect of bimetallic Pd–Pt nanocrystals for highly efficient methanol oxidation electrocatalysts

“…1–6 Among the various fuel cell types, direct methanol fuel cells (DMFCs) have garnered attention due to their exceptional energy density, high conversion efficiency, light-weight nature, and comparatively low operating temperature. 7–9 Nevertheless, the slow kinetics of anodic oxidation and surface CO poisoning hinder the practical implementation of DMFCs. 10,11 As a result, extensive research efforts have been initiated in this field.…”