Combining surface chemical functionalization with introducing reactive oxygen species boosts ethanol electrooxidation

Abstract

The introduction of functional groups or oxygen vacancies into Pd-based electrocatalysts is a powerful strategy for enhancing those electrocatalytic performances toward many electrocatalytic reactions. Herein, an amorphous ceria-modified Pd nanocomposites...

Milestones of Electrocatalyst Development for Direct Alcohol Fuel Cells

“…[78] Ideal Pd-based catalysts, therefore, should have suitable binding energy with CH 3 CO and OH intermediates, which can be changed by the downshifted d-band center. For example, Zhao et al [79] combined a surface chemical functionalization with structure defect engineering to fabricate the Pd-CeO 2-x /FGS, serving the alkaline EOR electrocatalyst (Figure 4a,b). The obtained catalyst exhibited impressive mass activity (specific activity) of 1871.3 mA mg −1 (5.62 mA cm −2 ), being 4.78 (2.93) times enhancement versus the commercial Pd/C electrocatalyst.…”

“…Due to the enhanced reaction kinetic, the optimal catalyst had mass activity up to 8452.8 mA mg Pd −1 , being a fivefold increase compared to the pure Pd. Recently, Yang et al [87] suggested the promoting effect of the Ni(OH) 2 on the EOR performance of Pd-based electrocatalysts by the formation of configuration between Pd and amorphous Ni(OH) 2 species, resulting in the optimization of the Pd─Pd interatomic distance and then the generation of the [79] Copyright 2022, Royal Society of Chemistry. c-e) Reproduced with permission.…”

“…a,b) Reproduced with permission. [ 79 ] Copyright 2022, Royal Society of Chemistry. c–e) Reproduced with permission.…”

“…Figure 4. a) CV curves of the Pd-CeO 2-x /FGS catalyst in N 2 -saturated 1.0 m KOH + 1.0 m C 2 H 5 OH at a scan rate of 50 mV s −1 , b) schematic illustration of the roles of the DAP-functionalization and CeO 2-x -modification during the EOR process, c) CV curve at a scan rate of 50 mV s −1 , and d) Nyquist plots of the PdPbBi@rGO/CPM-5 electrocatalyst in 1 m KOH + 0.5 m EG electrolyte, e) oxidation mechanism of EG and removal process of CO ads intermediates from Pd sites, f) possible schematic synthesis process of the Pd 3 Pb NDs, and g) CV curves of the Pd 3 Pb NWs in N 2 -saturated 1.0 m KOH + 1.0 m GE. a,b) Reproduced with permission [79]. Copyright 2022, Royal Society of Chemistry.…”

A universal synthesis strategy of Pd-based trimetallic nanowires for efficient alcohol electrooxidation

“…1,2 Platinum (Pt) and palladium (Pd) based noble metal catalysts have been widely used for anode alcohol oxidation reaction (AOR) in DAFCs, however, the unsatisfactory activity and poor stability have impeded their further application. [3][4][5][6] Hence, developing high-performance anodic AOR catalysts is of great importance for the widespread utilization of DAFCs.…”