Strain engineering for Janus palladium-gold bimetallic nanoparticles: Enhanced electrocatalytic performance for oxygen reduction reaction and zinc-air battery

Structural Modulation on NiCo2S4Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O2Batteries**

“…[17][18][19] During ORR, O 2 can also be reduced to H 2 O with 4e À process (4e-ORR), which decreases H 2 O 2 yield greatly. [20][21][22][23][24][25] The selectivity towards H 2 O 2 depends on the binding energy between electrocatalyst and OOH*. [26][27][28] In detail, low binding energy facilitates 2e-ORR and generates H 2 O 2 , while high binding energy favors 4e-ORR, which leads to breaking of OÀ O bond and produces H 2 O.…”

Fe-Modified Pd as an Effective Multifunctional Electrocatalyst for Catalytic Oxygen Reduction and Glycerol Oxidation Reactions in Alkaline Media

“…) at 900 mV RHE is significantly larger than the majority of the reports of j k = 0.05−3.7 mA cm noble-metal −2 (0.04−2.0 A mg noble-metal −1 ) for the anodic direction, 3,13,14,16,17 and j k = 0.2− 0.6 mA cm noble-metal −2 (0.08−2.0 A mg noble-metal −1 ) for the unspecified direction. 22−24 ).…”

“…For comparison, at 900 mV RHE , the achieved j k (A mg Pd –1 ) = 1.04 (PdFe/Vulcan) and 0.81 (PdFe/rGO) are 5.2–10.7 times higher than those of the reported nanoalloys of Pd 3 Fe/C ( j k = 0.097 A mg Pd –1 ) and PdFe/C ( j k = 0.157 A mg Pd –1 ) . In summary, the obtained j k = 2.2 mA cm Pd –2 (1.04 A mg Pd –1 ) at 900 mV RHE is significantly larger than the majority of the reports of j k = 0.05–3.7 mA cm noble‑metal –2 (0.04–2.0 A mg noble‑metal –1 ) for the anodic direction, ,,,, and j k = 0.2–0.6 mA cm noble‑metal –2 (0.08–2.0 A mg noble‑metal –1 ) for the unspecified direction. − These data do not include the unprecedented record of j k = 11.6 mA cm Pd –2 (16.4 A mg Pd –1 ) for PdMo-bimetallene/C and where the performance of Pd-metallene/C ( j k = 0.48 mA cm Pd –2 or 0.65 A mg Pd –1 ) was well below the monometallic Pd/Vulcan synthesized by the present method ( j k = 2.82 mA cm Pd –2 or 0.72 A mg Pd –1 ). The driving force underlying this excellent enhancement in the electrocatalytic efficiency of the engineered nanocatalysts is the same as those previously discussed in the study of glycerol oxidation and CO stripping.…”

“…Seminal studies have shown that the short list of metals that are likely to enable the aforementioned functional compromise is composed of Pt and Pd. , The addition of abundant d-block metals (Fe, Sn, Mn, Bi, Ni, and Ag) to noble metals of Pt, Pd, and Au is a strong means of significantly reducing the precious metal quantity and synergistically increasing the electrocatalytic indicators of performance during the oxidation of glycerol in alkaline media. − Recently, a number of reports have revealed that high electrocatalytic performance could be achieved in these types of nanocatalysts, that is, E onset = 0.2–0.6 V RHE at the onset and j p = 2–5 mA cm metal –2 (1–18 A mg metal –1 and 50–300 mA cm geo –2 ) at the peak. ,− Pd-based nanostructured materials that provide similar or even better ORR performance than those based on Pt in basic electrolytes are the best compromise for both processes of the ORR and glycerol oxidation. Quantitatively, rotating disk/ring electrode (RDE/RRDE, 1600 rpm) studies showed that the half-wave potential of the ORR is enhanced ( E 1/2 = 0.87–0.95 V RHE ) and the mass transport-free kinetic current density j k = 0.5–11.6 mA cm metal –2 = 0.5–16.4 A mg metal –1 in 0.1 M KOH. − However, there are currently no comprehensive studies about the multifunctional ability of these high-performance materials, that is, simultaneous use of the same material for the ORR and the electro-oxidation of organics in aqueous alkaline electrolytes.…”

Bacterial extracellular electron transfer: a powerful route to the green biosynthesis of inorganic nanomaterials for multifunctional applications

“…Synthesis of bimetallic nanoparticles is therefore receiving attention. For instance, bimetallic Pd-Au nanoparticles have been applied as excellent catalysts for different reactions, including but not limited to carbon dioxide reduction [ 107 ], oxygen reduction reaction [ 108 ], methanol oxidation [ 109 ], nitrite reduction [ 110 ], and selective detection of reactive oxygen and nitrogen species [ 111 ]. Great effort has been placed on developing physical and chemical methodologies capable of synthesizing bimetallic nanocrystals with well-defined structures and rational-tuned features [ 106 ].…”