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Serializer

App\Entity\MediaTranslation {#1383
  -id: 7044
  -title: "Fuel cell"
  -description: """
    <p>The fuel cell works as follows:</p>\r\n
    \r\n
    <ul>\r\n
    \t<li>On the anode side (-), an oxidation reaction takes electrons from a fuel.</li>\r\n
    \t<li>On the cathode side (+), a reduction reaction allows an oxidant to capture electrons.</li>\r\n
    \t<li>The electrons follow a separate path and deliver an exploitable current.</li>\r\n
    </ul>\r\n
    \r\n
    <p>There are several types of fuel (ethanol, methanol) but it is mainly dihydrogen that is used. This is known as a &quot;hydrogen fuel cell&quot;. The oxidant is always the oxygen of the air (O<sub>2</sub>).</p>\r\n
    \r\n
    <p>The hydrogen fuel cell is considered a clean energy source. It consumes hydrogen and oxygen, two elements that are abundant on Earth. In addition, the production of electricity from such a battery only emits water (H<sub>2</sub>O). However, there are still some negative points that need to be resolved before considering scaling up:</p>\r\n
    \r\n
    <ul>\r\n
    \t<li>Platinum is used as a catalyst. It is a rare and polluting metal.</li>\r\n
    \t<li>As much as the hydrogen element (H) is abundant, so much the dihydrogen (H<sub>2</sub>) is not. It must therefore be produced upstream, for example by electrolysis. This production consumes energy. The energy gain of the hydrogen fuel cell is reduced accordingly.</li>\r\n
    \t<li>Once H<sub>2</sub> is produced, it must be transported and stored. Dihydrogen is &quot;extremely flammable&quot; (remember the Hindenburg accident) and it takes a lot of energy to compress it in the gaseous or liquid state (at -250 &deg; C).</li>\r\n
    </ul>\r\n
    \r\n
    <p>It remains a promising source of energy and many research projects are trying to solve or get around these problems.</p>
    """
  -legends: """
    H₂\r\n
    O₂\r\n
    H₂O\r\n
    H⁺\r\n
    Air\r\n
    Anode\r\n
    Cathode\r\n
    e⁻\r\n
    Electrons\r\n
    H₂ → 2H⁺ + 2e⁻\r\n
    O₂ + 4e⁻ + 4H⁺ → 2H₂O\r\n
    Electrolyte
    """
  -goals: """
    <ul>\r\n
    \t<li>To illustrate the oxidation and reduction reactions.</li>\r\n
    \t<li>To discover the operating principle of the fuel cell.</li>\r\n
    \t<li>To teach the advantages and disadvantages of the hydrogen fuel cell.</li>\r\n
    </ul>
    """
  -more: null
  -scenario: null
  -features: null
  -publishedAt: DateTimeImmutable @1584403200 {#1380
    date: 2020-03-17 00:00:00.0 UTC (+00:00)
  }
  -preventIndexForSearch: false
  #locale: "en"
  #translatable: App\Entity\Media {#1308 …}
  #status: "published"
  #createdAt: DateTime @1582198414 {#1381
    date: 2020-02-20 11:33:34.0 UTC (+00:00)
  }
  #updatedAt: DateTime @1767628653 {#1382
    date: 2026-01-05 15:57:33.0 UTC (+00:00)
  }
}

[
  0 => "internal_api_media"
  "internal_api_media_options" => [
    "withBaseNodeName" => true
  ]
]