# Pourbaix Diagram

In this section, we review how to use the Pourbaix Diagram app to generate Pourbaix diagrams for different elements. The app can generate diagrams for up to 4 elements at a time. We show generating the Fe and Fe-Cr Pourbaix diagram and illustrate some of the Advanced Options available in the app.

Here are the articles in this section:

{% content-ref url="/pages/hHHlTiCtRxf3TEBq8xS6" %}
[Background](/apps/analysis-apps/pourbaix-app/background.md)
{% endcontent-ref %}

{% content-ref url="/pages/du33rRZdcjXWJa7ampDi" %}
[Tutorial](/apps/analysis-apps/pourbaix-app/tutorial.md)
{% endcontent-ref %}

{% content-ref url="/pages/5X11QUYTIdZbZkJbRQKW" %}
[FAQ](/apps/analysis-apps/pourbaix-app/faq-+-known-issues.md)
{% endcontent-ref %}


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.materialsproject.org/apps/analysis-apps/pourbaix-app.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.