Citation: Xianbin Ma, Yuanyuan Feng, Yang Li, Yunshi Han, Guoping Lu, Haifang Yang, Desheng Kong. Promoting effect of polyaniline on Pd catalysts for the formic acid electrooxidation reaction[J]. Chinese Journal of Catalysis, ;2015, 36(7): 943-951. doi: 10.1016/S1872-2067(15)60863-4 shu

Promoting effect of polyaniline on Pd catalysts for the formic acid electrooxidation reaction

1.
Key Laboratory of Life-Organic Analysis, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China

Corresponding author: Yuanyuan Feng,
Received Date: 4 January 2015
Available Online: 14 April 2015
Fund Project: 国家自然科学基金(21403125) (21403125) 山东省优秀中青年科学家科研奖励基金(BS2011NJ009). (BS2011NJ009)

Pd-based nanomaterials have been considered as an effective catalyst for formic acid electrooxidation reaction (FAOR). Herein, we reported two types of polyaniline (PANI)-promoted Pd catalysts. One was an nPANI/Pd electrocatalyst prepared by the electropolymerization of aniline and the electrodeposition of Pd. The other was a Pd/C/nPANI catalyst prepared by the direct electropolymerization of aniline on a commercial Pd/C catalyst. The results show that PANI alone has no catalytic activity for FAOR; however, PANI can exhibit a significant promoting effect to Pd. The current densities of FAOR on the Pd catalysts with a PANI coating show a significant increase compared with that of the Pd reference catalyst without PANI as a promoter. The promoting effects of PANI are strongly dependent on the electropolymerization potential cycles (n). The highest catalytic activities for FAOR of all the nPANI/Pd and Pd/C/nPANI catalysts were those of 15PANI/Pd and Pd/C/20PANI. The mass-specific activity (MSA) of Pd in 15PANI/Pd was 7.5 times that of the Pd catalyst, and the MSA and intrinsic activity of Pd/C/20PANI were 2.3 and 3.3 times that of the Pd/C catalyst, respectively. The enhanced performance of Pd catalysts is proposed as an electronic effect between Pd nanoparticles and PANI.
- Palladium,
- Polyaniline,
- Electrocatalysis,
- Formic acid electrooxidation reaction
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