An Effective Pt-Cu/SiO<sub>2</sub> Catalyst for the Selective Hydrogenation of Cinnamaldehyde

<table class="fixed-width table-group" id="tab2"><tr><td><table class="table"><colgroup><col style="width:6.12em"/><col style="width:5.19em"/><col style="width:3.41em"/><col style="width:6.01em"/><col style="width:11.40em"/></colgroup><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Sample</td><td class="align_center" rowspan="2">Pt species</td><td class="align_center" colspan="2">Pt species BE (eV)</td><td class="align_center" rowspan="2">Content of Pt species (%)</td></tr><tr class="thead"><td class="align_center"><span style="width: 23.5387ptpx;"><svg height="13.9156pt" id="M28" style="vertical-align:-4.67945pt" version="1.1" viewbox="-0.0498162 -9.23615 23.5387 13.9156" width="23.5387pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M456 178V225H360V632H320C217 496 115 347 20 206V178H280V106C280 40 276 34 189 27V0H445V27C364 34 360 39 360 106V178H456ZM280 225H82C149 335 214 431 278 520H280V225Z" id="g113-53"></path></g><g transform="matrix(.013,0,0,-0.013,6.24,0)"><path d="M54 437L27 408L31 397H101V103C101 37 94 32 30 26V0H266V25C187 33 180 36 180 110V397H288C299 404 304 428 298 437H180V477C179 562 190 610 203 630C214 647 230 659 256 659C289 659 318 641 337 622C346 612 355 612 364 619C374 627 380 635 383 643C388 655 387 667 378 678C362 697 333 710 299 712C260 707 225 689 189 659C135 613 119 563 112 541S101 490 101 458V437H54Z" id="g121-100"></path></g><g transform="matrix(.0091,0,0,-0.0091,10.088,3.132)"><path d="M453 623H65C60 580 56 530 46 472H80C103 538 110 548 175 548H389C310 380 195 168 90 0L98 -12L175 -2C273 206 366 408 462 610L453 623Z" id="g50-56"></path></g><g transform="matrix(.0091,0,0,-0.0091,14.522,3.132)"><path d="M381 704H317L48 -163H112L381 704Z" id="g50-48"></path></g><g transform="matrix(.0091,0,0,-0.0091,18.429,3.132)"><path d="M414 144C384 79 371 75 317 75H135L276 221C367 316 408 376 408 465C408 570 327 635 237 635C179 635 131 609 100 575L42 494L67 471C94 510 138 565 205 565C277 565 321 517 321 435C321 348 258 270 195 195C146 137 88 81 33 26V0H411C423 44 433 88 446 135L414 144Z" id="g50-51"></path></g></svg></span></td><td class="align_center"><span style="width: 23.5387ptpx;"><svg height="13.9156pt" id="M29" style="vertical-align:-4.67945pt" version="1.1" viewbox="-0.0498162 -9.23615 23.5387 13.9156" width="23.5387pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M456 178V225H360V632H320C217 496 115 347 20 206V178H280V106C280 40 276 34 189 27V0H445V27C364 34 360 39 360 106V178H456ZM280 225H82C149 335 214 431 278 520H280V225Z" id="g113-53"></path></g><g transform="matrix(.013,0,0,-0.013,6.24,0)"><path d="M54 437L27 408L31 397H101V103C101 37 94 32 30 26V0H266V25C187 33 180 36 180 110V397H288C299 404 304 428 298 437H180V477C179 562 190 610 203 630C214 647 230 659 256 659C289 659 318 641 337 622C346 612 355 612 364 619C374 627 380 635 383 643C388 655 387 667 378 678C362 697 333 710 299 712C260 707 225 689 189 659C135 613 119 563 112 541S101 490 101 458V437H54Z" id="g121-100"></path></g><g transform="matrix(.0091,0,0,-0.0091,10.088,3.132)"><path d="M158 548H390L417 615L410 623H122L83 318C105 326 143 337 185 337C296 337 350 275 350 188C350 116 308 42 225 42C164 42 122 74 100 93C90 101 82 99 72 92C60 82 51 68 50 59C48 46 52 38 66 24C82 9 125 -12 172 -12C225 -11 292 15 346 59C408 108 437 166 437 226C437 309 371 397 242 397C214 397 170 382 133 369L158 548Z" id="g50-54"></path></g><g transform="matrix(.0091,0,0,-0.0091,14.52,3.132)"><path d="M381 704H317L48 -163H112L381 704Z" id="g50-48"></path></g><g transform="matrix(.0091,0,0,-0.0091,18.428,3.132)"><path d="M414 144C384 79 371 75 317 75H135L276 221C367 316 408 376 408 465C408 570 327 635 237 635C179 635 131 609 100 575L42 494L67 471C94 510 138 565 205 565C277 565 321 517 321 435C321 348 258 270 195 195C146 137 88 81 33 26V0H411C423 44 433 88 446 135L414 144Z" id="g50-51"></path></g></svg></span></td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left" rowspan="3">Pt/SiO<sub>2</sub></td><td class="align_center">Pt<sup>0</sup></td><td class="align_center">71.14</td><td class="align_center">74.49</td><td class="align_center">28</td></tr><tr><td class="align_center">Pt<sup>2+</sup></td><td class="align_center">73.34</td><td class="align_center">76.69</td><td class="align_center">53</td></tr><tr><td class="align_center">Pt<sup>4+</sup></td><td class="align_center">75.52</td><td class="align_center">78.87</td><td class="align_center">19</td></tr><tr><td class="align_left" colspan="5"><hr/></td></tr><tr><td class="align_left" rowspan="2">Pt-Cu/SiO<sub>2</sub></td><td class="align_center">Pt<sup>0</sup></td><td class="align_center">70.93</td><td class="align_center">74.28</td><td class="align_center">60</td></tr><tr><td class="align_center">Pt<sup>2+</sup></td><td class="align_center">72.99</td><td class="align_center">76.34</td><td class="align_center">40</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Binding energies of the Pt 4f levels and the content of Pt species for the different catalysts.</div>

Journal of Chemistry

tab2

Table 2

Table 2: An Effective Pt-Cu/SiO<sub>2</sub> Catalyst for the Selective Hydrogenation of Cinnamaldehyde 

Journal of Chemistry

An Effective Pt-Cu/SiO2 Catalyst for the Selective Hydrogenation of Cinnamaldehyde

Table 2

An Effective Pt-Cu/SiO₂ Catalyst for the Selective Hydrogenation of Cinnamaldehyde