Facile synthesis of AuPd nanowires anchored on the hybrid of layered double hydroxide and carbon black for enhancing catalytic performance towards ethanol electro-oxidation

Electrodeposition of Pt3Sn Nano‐alloy on NiFe‐Layered Double Hydroxide with “Card‐house” Structure for Enhancing the Electrocatalytic Oxidation Performance of Ethanol

“…Possibly due to the presence of OH À on NiFe-LDH, which effectively promote the rapid oxidation of the intermediate products, thereby improving the catalytic effect after alloyed Pt 3 Sn NPs loading on NiFe-LDH/NF. [22,30] In addition, the specific activity of the presented Pt 3 Sn NPs/NiFe-LDH/NF catalyst was higher than that of the previously reported Pt-based EOR catalyst (Table 1). Pt 3 Sn NPs/NiFe-LDH/NF has higher catalytic activity than that of PtSn [42] and pure LDH, [43,44] indicating that the synergy between Pt 3 Sn NPs and NiFe-LDH/NF also effectively improves the anti-poisoning ability of Pt 3 Sn NPs.…”

“…The EOR catalytic activity of the Pt 3 Sn NPs/LDH‐NF was higher than that of the Pt 3 Sn NPs/NF and Pt/C (20%). Possibly due to the presence of OH − on NiFe‐LDH, which effectively promote the rapid oxidation of the intermediate products, thereby improving the catalytic effect after alloyed Pt 3 Sn NPs loading on NiFe‐LDH/NF [22,30] . In addition, the specific activity of the presented Pt 3 Sn NPs/NiFe‐LDH/NF catalyst was higher than that of the previously reported Pt‐based EOR catalyst (Table 1).…”

“…Pt 3 Sn NPs/NiFe-LDH/NF has higher catalytic activity than that of PtSn [42] and pure LDH, [43,44] indicating that the synergy between Pt 3 Sn NPs and NiFe-LDH/NF also effectively improves the anti-poisoning ability of Pt 3 Sn NPs. And the addition of oxygen-philic metals can form metal oxides, which can effectively enhance the anti-toxicity of the catalyst.The Pt 3 Sn NPs/NiFe-LDH/NF exhibited the lowest Tafel slope (45.45 mV dec À 1 ) among Pt 3 Sn NPs/NiFe-LDH/NF, Pt NPs/NiFe-LDH/NF, Sn NPs/NiFe-LDH/NF, Pt 3 Sn NPs/NF, and NiFe-LDH/NF, indicating that the overpotential of the Pt 3 Sn NPs/NiFe-LDH/NF was lower than that of the Pt NPs/NiFe-LDH/NF, Sn NPs/NiFe- [30] MgFe-LDH 1.0 KOH + 1.0 ethanol 1.14 [43] NiFe-LDH 1.0 KOH + 1.0 ethanol 1.6 [44] NiFe-LDH@MnO 2 1.0 KOH + 1.0 ethanol 4.5 [44] PtNiRh/C 0.1 KOH + 0.5 ethanol 13.6 � 0.9 [46] Pt∧(Au@Pd) 0.1 KOH + 0.5 ethanol 1.6 [47] Pt@HfSx/CNT 0.1 KOH + 1.0 ethanol 11.07 [48] 3D-Pt 51 Pd 49 @GNS 0.1 KOH + 2.0 ethanol 29 [49] Pt 50 Ru 50 /C 1.0 KOH + 1.0 ethanol 6.2 [50] Pt 1 Rh 1 ANDs 1.0 KOH + 1.0 ethanol 7.8 [51] Ni 40 Au 33 Pt 27 -NGs 0.5 NaOH + 1.0 ethanol 1.25 [52] PtSn 1.0 KOH + 1.0 ethanol 17.8 [42] Pt 1-x-y Ir x Ni y 1.0 KOH + 1.0 ethanol 5.2 [53] Pt 3 Mo 1 /C 0.5 KOH + 0.5 ethanol 3.4 [54] Pt 3 Ag wavy NWs 1.0 KOH + 1.0 ethanol 28 [55] PtPdCu NDs 1.0 KOH + 1.0 ethanol 15.82 [56] PtPd PNCs 1.0 KOH + 1.0 ethanol 2.1 [57] Pd/LDH-NW 1.0 KOH + 1.0 ethanol 2.01 [58] Pt LDH/NF, Pt 3 Sn NPs/NF, and NiFe-LDH/NF, and the most complete reaction in the electrocatalytic ethanol process. [45] Figure S4 † (a) showed the CV curves of the NiFe-LDH/NF loaded with different ratios of PtSn NPs in 1.0 M KOH saturated with nitrogen.…”

“…Owing to their highly tunable chemical compositions, adjustable morphologies, and controllable laminate thickness and grain sizes, we envision that Pt 3 Sn alloys can be orderly and stably anchored on LDHs that inherit the atomic dispersion feature of the LDHs structure. In addition, the metal hydroxides that make up the LDHs layer can promote OH − transfer on the catalyst surface, accelerate CO oxidation, and improve the anti‐toxicity of the catalyst [30,31] . The array structure design of the LDHs on the conductive substrate (metal, conductive glass, conductive carbon paper, or carbon cloth) not only satisfies the rapid migration and diffusion of the ions and accelerates the electron conduction, but also greatly enhances the stability of the electrode structure.…”

“…In addition, the metal hydroxides that make up the LDHs layer can promote OH À transfer on the catalyst surface, accelerate CO oxidation, and improve the anti-toxicity of the catalyst. [30,31] The array structure design of the LDHs on the conductive substrate (metal, conductive glass, conductive carbon paper, or carbon cloth) not only satisfies the rapid migration and diffusion of the ions and accelerates the electron conduction, but also greatly enhances the stability of the electrode structure. Pioneering studies have already shown that nickel foam (NF) as the growth substrate can not only improve the electrical conductivity of LDHs, but also provide the Ni element, which reduces the oxidation potential of ethanol and increases the current density.…”