Super-Branched PdCu Alloy for Efficiently Converting Carbon Dioxide to Carbon Monoxide
The alloying of noble metals with Cu is one of the most effective strategies for improving catalytic performance and reducing cost in electrocatalytic carbon dioxide reduction reactions (CO<sub>2</sub>RR). Previous works usually focused on the influence of morphology and composition on t...
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MDPI AG
2023-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/3/603 |
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| author | Kaili Bao Yunjie Zhou Jie Wu Zenan Li Xiong Yan Hui Huang Yang Liu Zhenhui Kang |
| author_facet | Kaili Bao Yunjie Zhou Jie Wu Zenan Li Xiong Yan Hui Huang Yang Liu Zhenhui Kang |
| author_sort | Kaili Bao |
| collection | DOAJ |
| description | The alloying of noble metals with Cu is one of the most effective strategies for improving catalytic performance and reducing cost in electrocatalytic carbon dioxide reduction reactions (CO<sub>2</sub>RR). Previous works usually focused on the influence of morphology and composition on the catalytic activity, but lacked the study of the valence state ratio of metals and the electron transfer behavior on alloys. In this work, PdCu−2 alloy (Pd/Cu molar ratio is 1:2) was obtained by a simple one-step solvothermal method, which can effectively convert CO<sub>2</sub> to CO with a maximum Faradaic efficiency (FE) of 85% at −0.9 V (vs. RHE). Then, the effect of the chemical state of Pd and Cu on the catalytic performance was investigated. The X-ray photoelectron spectroscopy (XPS) shows that the binding energy of Pd in PdCu alloy has a negative shift, which has affected the adsorption of key intermediates. When the proportion of oxidized state and zero-valent metal in the alloy is about 1:2, the PdCu alloy shows the best catalytic activity. In addition, the transient photovoltage (TPV) measurements further demonstrate that due to the introduction of Cu, the electron transfer rate of PdCu−2 becomes the slowest, which helps the accumulation of electrons on PdCu−2 and leads to the improvement of catalytic performance for electrocatalytic CO<sub>2</sub>RR. This work can provide more insights into the alloy catalysts of electrocatalytic CO<sub>2</sub>RR. |
| first_indexed | 2024-03-11T09:31:08Z |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T09:31:08Z |
| publishDate | 2023-02-01 |
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| spelling | doaj.art-2c5ffa36996e49b7a7853c1f1cc7aae02023-11-16T17:37:10ZengMDPI AGNanomaterials2079-49912023-02-0113360310.3390/nano13030603Super-Branched PdCu Alloy for Efficiently Converting Carbon Dioxide to Carbon MonoxideKaili Bao0Yunjie Zhou1Jie Wu2Zenan Li3Xiong Yan4Hui Huang5Yang Liu6Zhenhui Kang7Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, ChinaInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, ChinaInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, ChinaInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, ChinaInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, ChinaInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, ChinaInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, ChinaInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, ChinaThe alloying of noble metals with Cu is one of the most effective strategies for improving catalytic performance and reducing cost in electrocatalytic carbon dioxide reduction reactions (CO<sub>2</sub>RR). Previous works usually focused on the influence of morphology and composition on the catalytic activity, but lacked the study of the valence state ratio of metals and the electron transfer behavior on alloys. In this work, PdCu−2 alloy (Pd/Cu molar ratio is 1:2) was obtained by a simple one-step solvothermal method, which can effectively convert CO<sub>2</sub> to CO with a maximum Faradaic efficiency (FE) of 85% at −0.9 V (vs. RHE). Then, the effect of the chemical state of Pd and Cu on the catalytic performance was investigated. The X-ray photoelectron spectroscopy (XPS) shows that the binding energy of Pd in PdCu alloy has a negative shift, which has affected the adsorption of key intermediates. When the proportion of oxidized state and zero-valent metal in the alloy is about 1:2, the PdCu alloy shows the best catalytic activity. In addition, the transient photovoltage (TPV) measurements further demonstrate that due to the introduction of Cu, the electron transfer rate of PdCu−2 becomes the slowest, which helps the accumulation of electrons on PdCu−2 and leads to the improvement of catalytic performance for electrocatalytic CO<sub>2</sub>RR. This work can provide more insights into the alloy catalysts of electrocatalytic CO<sub>2</sub>RR.https://www.mdpi.com/2079-4991/13/3/603PdCu alloyelectrocatalytic CO<sub>2</sub> reduction reactiontransient photovoltageCO |
| spellingShingle | Kaili Bao Yunjie Zhou Jie Wu Zenan Li Xiong Yan Hui Huang Yang Liu Zhenhui Kang Super-Branched PdCu Alloy for Efficiently Converting Carbon Dioxide to Carbon Monoxide Nanomaterials PdCu alloy electrocatalytic CO<sub>2</sub> reduction reaction transient photovoltage CO |
| title | Super-Branched PdCu Alloy for Efficiently Converting Carbon Dioxide to Carbon Monoxide |
| title_full | Super-Branched PdCu Alloy for Efficiently Converting Carbon Dioxide to Carbon Monoxide |
| title_fullStr | Super-Branched PdCu Alloy for Efficiently Converting Carbon Dioxide to Carbon Monoxide |
| title_full_unstemmed | Super-Branched PdCu Alloy for Efficiently Converting Carbon Dioxide to Carbon Monoxide |
| title_short | Super-Branched PdCu Alloy for Efficiently Converting Carbon Dioxide to Carbon Monoxide |
| title_sort | super branched pdcu alloy for efficiently converting carbon dioxide to carbon monoxide |
| topic | PdCu alloy electrocatalytic CO<sub>2</sub> reduction reaction transient photovoltage CO |
| url | https://www.mdpi.com/2079-4991/13/3/603 |
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