Study of pd-au/c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement
Direct formic acid fuel cells are gaining popularity due to its efficiency and safety. Palladium (Pd) based catalysts exhibit better activity towards formic acid oxidation (FAO) compared to Platinum (Pt). Thus, a study on FAO exhibited by different surface coverage of Pd on gold (Au) substrate was d...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2010
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/38951 |
| _version_ | 1826110662090162176 |
|---|---|
| author | Yeo, Cheng Yao. |
| author2 | Wang Xin (SCBE) |
| author_facet | Wang Xin (SCBE) Yeo, Cheng Yao. |
| author_sort | Yeo, Cheng Yao. |
| collection | NTU |
| description | Direct formic acid fuel cells are gaining popularity due to its efficiency and safety. Palladium (Pd) based catalysts exhibit better activity towards formic acid oxidation (FAO) compared to Platinum (Pt). Thus, a study on FAO exhibited by different surface coverage of Pd on gold (Au) substrate was done. As underpotential deposition (UPD) can synthesize catalysts with specific surface coverage, it is utilised to create the Pd-Au catalyst. However, as UPD could occur over a range of values, the effect of varying the potential in the UPD range on the Cu adlayer surface coverage of gold substrate was first studied. After which, UPD, together with redox replacement, was used to synthesize the Pd-Au catalysts. Lastly, the activity of the Pd-Au catalysts on FAO was studied. The results showed that the Pd-Au catalyst with lower surface coverage possess the highest specific activity. However, they were the least stable, as their activity decreased rapidly due to electro dissolution of Pd metal into the acidic electrolyte. |
| first_indexed | 2024-10-01T02:38:10Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/38951 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:38:10Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/389512023-03-03T15:32:14Z Study of pd-au/c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement Yeo, Cheng Yao. Wang Xin (SCBE) School of Chemical and Biomedical Engineering DRNTU::Engineering::Nanotechnology Direct formic acid fuel cells are gaining popularity due to its efficiency and safety. Palladium (Pd) based catalysts exhibit better activity towards formic acid oxidation (FAO) compared to Platinum (Pt). Thus, a study on FAO exhibited by different surface coverage of Pd on gold (Au) substrate was done. As underpotential deposition (UPD) can synthesize catalysts with specific surface coverage, it is utilised to create the Pd-Au catalyst. However, as UPD could occur over a range of values, the effect of varying the potential in the UPD range on the Cu adlayer surface coverage of gold substrate was first studied. After which, UPD, together with redox replacement, was used to synthesize the Pd-Au catalysts. Lastly, the activity of the Pd-Au catalysts on FAO was studied. The results showed that the Pd-Au catalyst with lower surface coverage possess the highest specific activity. However, they were the least stable, as their activity decreased rapidly due to electro dissolution of Pd metal into the acidic electrolyte. Bachelor of Engineering (Chemical and Biomolecular Engineering) 2010-05-21T03:36:10Z 2010-05-21T03:36:10Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/38951 en Nanyang Technological University 37 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Nanotechnology Yeo, Cheng Yao. Study of pd-au/c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement |
| title | Study of pd-au/c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement |
| title_full | Study of pd-au/c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement |
| title_fullStr | Study of pd-au/c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement |
| title_full_unstemmed | Study of pd-au/c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement |
| title_short | Study of pd-au/c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement |
| title_sort | study of pd au c nanocatalysts synthesized by underpotential deposition of cu and pd redox replacement |
| topic | DRNTU::Engineering::Nanotechnology |
| url | http://hdl.handle.net/10356/38951 |
| work_keys_str_mv | AT yeochengyao studyofpdaucnanocatalystssynthesizedbyunderpotentialdepositionofcuandpdredoxreplacement |